2
20
25
-
https://geosciencecollections.milne-library.org/files/original/699794817e56ab3f3c933b9877efe45a.JPG
14a78a13570d6c0227f565a751073ce3
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Tennantville gabbroic anorthosite
https://geosciencecollections.milne-library.org/files/original/bfe40e12d218f4651d820d3acd9b1410.jpg
ded5cc862150ac50772d4b356e657da5
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Tennantville gabbroic anorthosite-thin section cross polarized light
https://geosciencecollections.milne-library.org/files/original/42bcc080d1c9372d77c2a45ce75fd398.jpg
2f74f27a69ccf7b94b2c1a9f3bc79e3f
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Tennantville gabbroic anorthosite-thin section plane polarized light
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
(ADK) Anorthosite-Charnockite and Metamorphic Suite --
Adirondack Mountains, New York
Description
An account of the resource
The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks.
This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area.
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
References
A related resource that is referenced, cited, or otherwise pointed to by the described resource.
<strong>Start here: <br /></strong>McLelland, J., and Selleck, B.W.,2011, Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi: <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>.<br /><ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li>
</ul><p><strong>Additional resources:<br /></strong>McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004, Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes: Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi: <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>.</p>
<ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifs <span>constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</span></li>
</ul><p>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks in <span>New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York<br /></span></p>
<ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li>
</ul><p>McLelland, J., Daly, J.S., and McLelland, J.M., 1996, The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>.</p>
<ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li>
</ul><p>McLelland, J., Lewis, A., and Moore, L., 1994, Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi: <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>.</p>
<ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li>
</ul><p>New York State Geological Survey<br /><a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html<br /></a></p>
<ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li>
</ul><p>Regan, S.P., Chiarenzelli, J.R., McLelland, J.M., and Cousens, B. L., 2011, Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.<span> 694-709, doi: <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>.<br /></span></p>
<ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li>
</ul>
Date
A point or period of time associated with an event in the lifecycle of the resource
1980
Temporal Coverage
Temporal characteristics of the resource.
The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era).
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
Spatial Coverage
Spatial characteristics of the resource.
This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State.
Rock
A physical material with a mineral composition.
Number of Thin Sections
Number of thin sections associated with this sample
1
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Identifier
An unambiguous reference to the resource within a given context
AD-14
Title
A name given to the resource
Tennantville gabbroic anorthosite
Spatial Coverage
Spatial characteristics of the resource.
Adirondack Highlands-collected from a low road cut on Military Road at the north edge of the Edinburg Quadrant.
Temporal Coverage
Temporal characteristics of the resource.
Precambrian
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
Is Part Of
A related resource in which the described resource is physically or logically included.
<a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a>
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
Description
An account of the resource
This medium grained facies is one of a number of anorthositic sheets that intrude throughout the stratigraphic section of the southern Adirondacks. A chemical analyses of specimens from this outcrop yield results that are almost identical with Buddington's (1939) average gabbroic anorthosite.<br /><table><tbody><tr><td>
<p>Â </p>
</td>
<td>
<p><br />Tennantville locality (McFarland)</p>
</td>
<td>
<p>Average Gabbroic<br />Anorthosite (Buddington)</p>
</td>
</tr><tr><td>
<p>SiOâ‚‚</p>
</td>
<td>
<p>52.36</p>
</td>
<td>
<p>52.37</p>
</td>
</tr><tr><td>
<p>TiOâ‚‚</p>
</td>
<td>
<p>1.14</p>
</td>
<td>
<p>-</p>
</td>
</tr><tr><td>
<p>Al₂O₃</p>
</td>
<td>
<p>23.75</p>
</td>
<td>
<p>24.68</p>
</td>
</tr><tr><td>
<p>Fe₂O₃</p>
</td>
<td>
<p>1.11</p>
</td>
<td>
<p>1.24</p>
</td>
</tr><tr><td>
<p>FeO</p>
</td>
<td>
<p>3.96</p>
</td>
<td>
<p>3.49</p>
</td>
</tr><tr><td>
<p>MnO</p>
</td>
<td>
<p>.07</p>
</td>
<td>
<p>-</p>
</td>
</tr><tr><td>
<p>MgO</p>
</td>
<td>
<p>1.53</p>
</td>
<td>
<p>2.0</p>
</td>
</tr><tr><td>
<p>CaO</p>
</td>
<td>
<p>10.63</p>
</td>
<td>
<p>10.57</p>
</td>
</tr><tr><td>
<p>Naâ‚‚O</p>
</td>
<td>
<p>3.69</p>
</td>
<td>
<p>4.02</p>
</td>
</tr><tr><td>
<p>Kâ‚‚O</p>
</td>
<td>
<p>.90</p>
</td>
<td>
<p>.86</p>
</td>
</tr><tr><td>
<p>Pâ‚‚Oâ‚…</p>
</td>
<td>
<p>.16</p>
</td>
<td>
<p>-</p>
</td>
</tr><tr><td>
<p>Hâ‚‚O+</p>
</td>
<td>
<p>.69</p>
</td>
<td>
<p>.90</p>
</td>
</tr><tr><td>
<p>Total</p>
</td>
<td>
<p>99.99%</p>
</td>
<td>
<p>100.13%</p>
</td>
</tr></tbody></table>
The existence of these instrusive sheets of gabbroic anorthosite argues strongly against the proposition that the anorthositic rocks constitute part of an older, pre-Grenvillian basement complex. Rocks similar to the Tennantville gabbroic anorthosite commonly occur as border facies surrounding larger, coarser bodies of anorthosite. Spongy, brick-red garnets are common in these rocks.<br />Thin section shows plagioclase and clinopyroxene.
Date
A point or period of time associated with an event in the lifecycle of the resource
1980
-
https://geosciencecollections.milne-library.org/files/original/03cda701b66f2dfc367ec01c10943bea.JPG
98a731a14fbc3aafbe3400040394b1b3
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Two Pyroxene-spinel metagabbro
https://geosciencecollections.milne-library.org/files/original/5ff49686be73c1eaf1376b8661c8ea5b.JPG
b670fee5ae90a7a09686159f3564f842
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Two Pyroxene-spinel metagabbro
https://geosciencecollections.milne-library.org/files/original/f370ffb98aac7ae376307f2ba32359d0.jpg
aaf77c16cc14ef30e3e7ca47556cfea3
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Two Pyroxene-spinel metagabbro-thin section cross polarized light
https://geosciencecollections.milne-library.org/files/original/f8441ffc2737cb8d6edb6226d4acd033.jpg
d0df95a566b822bedc5958e34b060914
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Two Pyroxene-spinel metagabbro-thin section plane polarized light
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
(ADK) Anorthosite-Charnockite and Metamorphic Suite --
Adirondack Mountains, New York
Description
An account of the resource
The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks.
This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area.
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
References
A related resource that is referenced, cited, or otherwise pointed to by the described resource.
<strong>Start here: <br /></strong>McLelland, J., and Selleck, B.W.,2011, Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi: <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>.<br /><ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li>
</ul><p><strong>Additional resources:<br /></strong>McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004, Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes: Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi: <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>.</p>
<ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifs <span>constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</span></li>
</ul><p>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks in <span>New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York<br /></span></p>
<ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li>
</ul><p>McLelland, J., Daly, J.S., and McLelland, J.M., 1996, The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>.</p>
<ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li>
</ul><p>McLelland, J., Lewis, A., and Moore, L., 1994, Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi: <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>.</p>
<ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li>
</ul><p>New York State Geological Survey<br /><a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html<br /></a></p>
<ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li>
</ul><p>Regan, S.P., Chiarenzelli, J.R., McLelland, J.M., and Cousens, B. L., 2011, Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.<span> 694-709, doi: <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>.<br /></span></p>
<ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li>
</ul>
Date
A point or period of time associated with an event in the lifecycle of the resource
1980
Temporal Coverage
Temporal characteristics of the resource.
The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era).
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
Spatial Coverage
Spatial characteristics of the resource.
This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State.
Rock
A physical material with a mineral composition.
Number of Thin Sections
Number of thin sections associated with this sample
1
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Identifier
An unambiguous reference to the resource within a given context
AD-19
Title
A name given to the resource
Two Pyroxene-spinel metagabbro
Spatial Coverage
Spatial characteristics of the resource.
Adirondack Highlands-collected from the first high hill just southwest of the intersection of NY Route 30 and Benson Rd., approximately 2 miles northwest of Northville, NY.
Temporal Coverage
Temporal characteristics of the resource.
Precambrian
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
Is Part Of
A related resource in which the described resource is physically or logically included.
<a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountns, New York</a>
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
Date
A point or period of time associated with an event in the lifecycle of the resource
1980
Description
An account of the resource
The locality near Northville, NY represents the only example of this assemblage that has been encountered to date (1980) in the Adirondacks. The original lithology is that of a typical olivine metagabbro. During granulite facies metamorphism, reactions produced coronas consisting of orthopyroxene rims on olivine and spinel-clinopyroxene symplectites. Amphibole-spinel coronas also occur. These assemblages appear to represent lower pressure conditions than prevailed during the formation of the garnet-bearing assemblages represented by AD-16.
The following information is from the original OCR document: The mineralogy and textural features of these metagabbros are discussed in McLelland and Whitney, 1980, Contributions to Mineralogy and Petrology, v.72, p.111, specimen 17 and Whitney and McLelland, "Origin of Coronas in Olivine Metagabbros of the Adirondack Mountains, NY," 1973, Contributions to Mineralogy and Petrology, v. 39, p.81-98. The specimen you receive may be somewhat smaller than the regular specimens. Dr. James McLelland collected this material especially for this suite-and in 100° temperature. Thank you, Jim.
Thin section shows augite, spinel and plagioclase.
-
https://geosciencecollections.milne-library.org/files/original/2ec6b07ab95c75d72406e9d07cb086d7.JPG
679414b2bb44a18076d2a675c1622f09
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Two-pyroxene-plagioclase granulite
https://geosciencecollections.milne-library.org/files/original/7eac3df37bf17d1b88f772b92cf911d6.jpg
6ac7ba0d7c37f54462ad12c115eeea78
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Two-pyroxene-plagioclase granulite-thin section cross polarized light
https://geosciencecollections.milne-library.org/files/original/f7f7e25e41116cec953a4a8c5257f5f4.jpg
aedd48504dfa16eeb8cc1c92a5fd8210
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Two-pyroxene-plagioclase granulite-thin section plane polarized light
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
(ADK) Anorthosite-Charnockite and Metamorphic Suite --
Adirondack Mountains, New York
Description
An account of the resource
The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks.
This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area.
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
References
A related resource that is referenced, cited, or otherwise pointed to by the described resource.
<strong>Start here: <br /></strong>McLelland, J., and Selleck, B.W.,2011, Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi: <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>.<br /><ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li>
</ul><p><strong>Additional resources:<br /></strong>McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004, Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes: Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi: <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>.</p>
<ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifs <span>constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</span></li>
</ul><p>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks in <span>New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York<br /></span></p>
<ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li>
</ul><p>McLelland, J., Daly, J.S., and McLelland, J.M., 1996, The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>.</p>
<ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li>
</ul><p>McLelland, J., Lewis, A., and Moore, L., 1994, Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi: <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>.</p>
<ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li>
</ul><p>New York State Geological Survey<br /><a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html<br /></a></p>
<ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li>
</ul><p>Regan, S.P., Chiarenzelli, J.R., McLelland, J.M., and Cousens, B. L., 2011, Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.<span> 694-709, doi: <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>.<br /></span></p>
<ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li>
</ul>
Date
A point or period of time associated with an event in the lifecycle of the resource
1980
Temporal Coverage
Temporal characteristics of the resource.
The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era).
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
Spatial Coverage
Spatial characteristics of the resource.
This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State.
Rock
A physical material with a mineral composition.
Unit
Formation or other descriptive rock category
Sacandaga Formation
Number of Thin Sections
Number of thin sections associated with this sample
1
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Identifier
An unambiguous reference to the resource within a given context
AD-12
Title
A name given to the resource
Two-pyroxene-plagioclase granulite
Spatial Coverage
Spatial characteristics of the resource.
Adirondack Highlands-collected on NY Route 30 from the west side of a road cut just north of Pumpkin Hollow.
Temporal Coverage
Temporal characteristics of the resource.
Precambrian
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
Is Part Of
A related resource in which the described resource is physically or logically included.
<a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a>
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
Description
An account of the resource
The Sacandaga Formation consists of a well layered series of dark granulites (AD-12) and leucogneisses (AD-13). Orthopyroxene is generally present in greater quantity than clinopyroxene. It is not known whether these rocks are metasedimentary or metaigneous. They are strongly foliated.
Thin section shows plagioclase (one with perthitic texture), orthopyroxene and quartz.
Date
A point or period of time associated with an event in the lifecycle of the resource
1980
-
https://geosciencecollections.milne-library.org/files/original/567255282ce128b0d75ee383bb98671f.JPG
05e822a74002ecd65cb3a463555d214a
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Wollastonite-garnet-diopside
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
(ADK) Anorthosite-Charnockite and Metamorphic Suite --
Adirondack Mountains, New York
Description
An account of the resource
The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks.
This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area.
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
References
A related resource that is referenced, cited, or otherwise pointed to by the described resource.
<strong>Start here: <br /></strong>McLelland, J., and Selleck, B.W.,2011, Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi: <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>.<br /><ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li>
</ul><p><strong>Additional resources:<br /></strong>McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004, Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes: Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi: <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>.</p>
<ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifs <span>constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</span></li>
</ul><p>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks in <span>New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York<br /></span></p>
<ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li>
</ul><p>McLelland, J., Daly, J.S., and McLelland, J.M., 1996, The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>.</p>
<ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li>
</ul><p>McLelland, J., Lewis, A., and Moore, L., 1994, Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi: <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>.</p>
<ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li>
</ul><p>New York State Geological Survey<br /><a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html<br /></a></p>
<ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li>
</ul><p>Regan, S.P., Chiarenzelli, J.R., McLelland, J.M., and Cousens, B. L., 2011, Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.<span> 694-709, doi: <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>.<br /></span></p>
<ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li>
</ul>
Date
A point or period of time associated with an event in the lifecycle of the resource
1980
Temporal Coverage
Temporal characteristics of the resource.
The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era).
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
Spatial Coverage
Spatial characteristics of the resource.
This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State.
Rock
A physical material with a mineral composition.
Number of Thin Sections
Number of thin sections associated with this sample
Thin section not available.
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Wollastonite-garnet-diopside
Date
A point or period of time associated with an event in the lifecycle of the resource
1980
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
Identifier
An unambiguous reference to the resource within a given context
AD-24
Spatial Coverage
Spatial characteristics of the resource.
Adirondack Highlands-this specimen was obtained from the NYCO MIne in Willsboro, NY.
Description
An account of the resource
This unique rock contains white crystalline wollastonite, brown grains of andradite garnet, and green diopside. Specimens courtesy of R.R. Bauer, plant manager of NYCO MInes (1980). McLelland reports some grossularite in addition to andradite.
The following information is from the original OCR document: This interesting rock is discussed by Buddington, 1939, p. 41-43. See also Buddington and Whitcomb, 1941, Geology of the Willsboro Quandrant, New York State Museum Bulletin 325 and Buddington, 1950, "Composition and Genesis of Pyroxene and Garnet Related to the Adirondack Anorthosite and Anorthosite-Marble Contacts," American Mineralogist, v.35, p.659-670.
Is Part Of
A related resource in which the described resource is physically or logically included.
<a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a>
Temporal Coverage
Temporal characteristics of the resource.
Precambrian
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
-
https://geosciencecollections.milne-library.org/files/original/0b40766f1b6c75232ea7110c64c6482e.JPG
56adae428338fdc271d29e6d864b9b6e
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Woolen Mill gabbro
https://geosciencecollections.milne-library.org/files/original/7cd9bf37fb7b3d52920e54740631485f.jpg
e0bfefdf8a7d4d934366e2eac529e3cb
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Woolen Mill gabbro-thin section cross polarized light
Description
An account of the resource
Thin section cross polarized light
https://geosciencecollections.milne-library.org/files/original/06ac8935442148c483c61c643468d5b9.jpg
2f155b1e673a77004b12aad5006fd08b
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Woolen Mill gabbro-thin section plane polarized light
Alternative Title
An alternative name for the resource. The distinction between titles and alternative titles is application-specific.
Thin section plane polarized light
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
(ADK) Anorthosite-Charnockite and Metamorphic Suite --
Adirondack Mountains, New York
Description
An account of the resource
The Adirondack Mountains of northern New York State are underlain by approximately 20,000 square miles of complexly deformed, high grade metamorphic rocks which are believed to represent a southern outlier of the much larger Grenville Province.The Adirondacks can be divided into the "Lowlands" and the "Highlands" . The Lowlands comprise the northwestern quarter of the belt and are characterized by amphibolite facies metamorphism. The Highlands appear to consist entirely of granulite facies rocks. All rocks in this suite have been collected from the Highlands and predominantly from the southern quarter of the Adirondacks.
This suite of rocks is designed to be representative of the Highlands in general. Therefore it includes both metasedimentary and metaigneous rocks. The latter are very common throughout the Adirondacks and contain the often-discussed anorthosite-charnockite suite of rocks. Almost all rocks in the Adirondack Highlands are strongly foliated. This is the result of intense polyphase deformation that has affected this area.
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
References
A related resource that is referenced, cited, or otherwise pointed to by the described resource.
<strong>Start here: <br /></strong>McLelland, J., and Selleck, B.W.,2011, Megacrystic Gore Mountain-type garnets in the Adirondack Highlands; age, origin, and tectonic implications:Geosphere, v.7, no. 5, p.1194-1208, doi: <a href="http://dx.doi.org/10.1130/GES00683.1" target="_blank">10.1130/GES00683.1</a>.<br /><ul><li>This article describes the formation of the megacrystic garnet amphibolites in the Gore Mountain section of the Adirondack Mountains. The authors conclude that three main factors influenced the garnet development: collapse of the Ottawan orogeny, intrusion of Lyon Mountain Granite, and fluid-related alteration at high temperature.</li>
</ul><p><strong>Additional resources:<br /></strong>McLelland, J.M., Bickford, M.E., Hill, B.M., Clechenko, C.C., Valley, J.W., and Hamilton, M.A., 2004, Direct dating of Adirondack Massif anorthosite by U-Pb SHRIMP analysis of igneous zircon; implications for AMCG complexes: Geological Society of America Bulletin, v.116, no. 11-12, p.1299-1317, doi: <a href="http://dx.doi.org/10.1130/B25482.1" target="_blank">10.1130/B25482.1</a>.</p>
<ul><li>This article describes techniques used to more accurately date the Adirondack Massif anorthosite.The authors concluded that the massifs <span>constitute a single, composite anorthosite-mangerite-charnockite-granite (AMCG) suite intruded at ca. 1155 Ma. Although the rock suite is considered to be coeval, the authors conclude the rocks are not comagmatic.</span></li>
</ul><p>McLelland, J., Bickford, M.E., Spear, F., and Storm, L., 2002, Geology and geochronolgy of the eastern Adirondacks in <span>New England Intercollegiate Geological Conference, 94th, New York State Geological Association 74th: guidebook for field trips in New York and Vermont : Lake George, New York<br /></span></p>
<ul><li>This field trip guide provides for nine stops in the eastern Adirondacks. It also include some thin sections images and zircon images from sample rocks of the field trip stops.</li>
</ul><p>McLelland, J., Daly, J.S., and McLelland, J.M., 1996, The Grenville orogenic cycle (ca. 1350-1000 Ma); an Adirondack perspective: Tectonophysics, v.265, issue 1-2, p.1-28, doi: <a href="http://dx.doi.org/10.1016/S0040-1951(96)00144-8" target="_blank">10.1016/S0040-1951(96)00144-8</a>.</p>
<ul><li>This article provides a detailed geochronological account of the Grenville orogeny (ca. 1350-1000 Ma) with emphasis on the impact it had on the formation of the Adirondack Mountains.</li>
</ul><p>McLelland, J., Lewis, A., and Moore, L., 1994, Composition and petrogenesis of oxide-, apatite-rich gabbronorites associated with Proterozoic anorthosite massifs: examples from the Adirondack Mountains, New York: Contributions to Mineralogy and Petrology, v.116, p.225-238, doi: <a href="http://dx.doi.org/10.1007/BF00310702" target="_blank">10.1007/BF00310702</a>.</p>
<ul><li>This article investigates the occurence of oxide-, apatite-rich gabbronorites with anorthosite massifs of the Adirondacks. The authors describe a multilple-step process of plagioclase crystal fractionation that ultimately leads to high concentrations of P, Fe, and Ti.</li>
</ul><p>New York State Geological Survey<br /><a href="http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html">http://www.nysm.nysed.gov/nysgs/nygeology/mineralogy/adirondacks/index.html<br /></a></p>
<ul><li>The NYS Geological Survey is a division of the New York State Museum system. This web page provides some details about the Adirondack Highlands and pictures of various minerals found in this region.</li>
</ul><p>Regan, S.P., Chiarenzelli, J.R., McLelland, J.M., and Cousens, B. L., 2011, Evidence for an enriched asthenospheric source for coronitic metagabbros in the Adirondack Highlands: Geosphere, v.7, issue 3, p.<span> 694-709, doi: <a href="http://dx.doi.org/10.1130/GES00629.1" target="_blank">10.1130/GES00629.1</a>.<br /></span></p>
<ul><li>This article describes the formation of coronitc metagabbros through tectonic processes involving the asthenosphere. Through geochemical and isotopic analyses, the authors provide a timeline of tectonic and petrologic events that supports an asthenospheric source for coronitic metagabbros.</li>
</ul>
Date
A point or period of time associated with an event in the lifecycle of the resource
1980
Temporal Coverage
Temporal characteristics of the resource.
The Adirondack Mountains were formed approximately 1.1- 1.3 billion years ago during the Grenville Orogeny (Precambrian eon, Proterozic era).
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
Spatial Coverage
Spatial characteristics of the resource.
This rock suite was collected from the Adirondack Mountains located in the northeastern part of New York State.
Rock
A physical material with a mineral composition.
Number of Thin Sections
Number of thin sections associated with this sample
1
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Identifier
An unambiguous reference to the resource within a given context
AD-23
Title
A name given to the resource
Woolen Mill gabbro
Spatial Coverage
Spatial characteristics of the resource.
Adirondack Highlands-collected from a road cut on NY Route 9N, i mile west of Elizabethtown.
Temporal Coverage
Temporal characteristics of the resource.
Precambrian
Contributor
An entity responsible for making contributions to the resource
Western Minerals Inc.
Is Part Of
A related resource in which the described resource is physically or logically included.
<a href="http://geosciencecollections.milne-library.org/collections/show/7">Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York</a>
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals Inc.
Description
An account of the resource
This specimen is representative of the pyroxene-plagioclase granulites that form from gabbros in the Adirondacks. This famous locality has been discussed, with analyses, by Buddington, 1939, Analysis 64L Table 15, and also in deWaard's 1965 type locality for the almandine-clinopyroxene subfacies of the granulite facies. The mineralogy is garnet-oligoclase-clinopyroxene-opaques. The texture is granoblastic. The original igneous texture and mineralogy have been totally replaced, at least locally, by two pyroxenes and plagioclase.
Thin section shows garnet, plagioclase and clinopyroxene.
Date
A point or period of time associated with an event in the lifecycle of the resource
1980