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Omeka Image File
The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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Omeka Image File
The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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Omeka Image File
The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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IPTC String
date_created:05.10.2013
IPTC Array
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Omeka Image File
The metadata element set that was included in the `files_images` table in previous versions of Omeka. These elements are common to all image files.
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IPTC String
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IPTC Array
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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
(FR) Sedimentary and Igneous Franciscan Assemblage Suite -- California
Description
An account of the resource
This 14 sample collection primarily consists of clastic sedimentary rocks with metamorphic and igneous components, representing a Franciscan Assemblage. This assemblage is indicative of a subduction zone along the California coast.
Contributor
An entity responsible for making contributions to the resource
Western Minerals, Inc. - Collection was supervised by Dr. Frederick C. Marshall, Assistant Professor of Geology at Principia College.
References
A related resource that is referenced, cited, or otherwise pointed to by the described resource.
<p><strong>Start here:<br /></strong>Ernst, W.G., 2015, Franciscan geologic history constrained by tectonic/olistostromal high-grade metamafic blocks in the iconic California Mesozoic-Cenozoic accretionary complex: American Mineralogist, v. 100, p. 6-13. <a href="http://dx.doi.org/10.2138/am-2015-4850" target="_blank"><span>doi: </span><span class="slug-doi">10.2138/am-2015-4850</span></a></p>
<ul><li>This source supplies useful information on the low temperature, high pressure environment in which these rocks formed. </li>
</ul><strong>Additional resources:<br /></strong>Barnes, J., Eldam, R., Lee, C.T., Errico, J., Loewy, S., and Cisneros, M., 2013, Petrogenesis of serpentinites from the Franciscan Complex, western California, USA: Lithos, v. 178, p. 143-157. <a class="S_C_ddDoi" href="http://dx.doi.org/10.1016/j.lithos.2012.12.018" target="_blank">doi:10.1016/j.lithos.2012.12.018</a><br /><ul><li>Describes the petrogenesis of serpentine as seen in one of the items in the collection (Fr-4).</li>
</ul><p>Cooper, F., Platt, J., and Anczkiewicz, R., 2011, Constraints on early Franciscan subduction rates from 2-D thermal modeling: Earth and Planetary Science Letters, v. 312, p. 69-79. doi:<a href="http://dx.doi.org/10.1016/j.epsl.2011.09.051">10.1016/j.epsl.2011.09.051</a></p>
<ul><li>This paper suggests that the rate of subduction in this area may have been five times lower than previous studies have found.</li>
</ul><p>Ghatak, A., Basu, A., and Wakabayashi, J., 2013, Implications of Franciscan Complex graywacke geochemistry for sediment transport, provenance determination, burial-exposure duration, and fluid exchange with cosubducted metabasites: Tectonics, v. 32, p. 1480-1492. doi:Â <a href="http://dx.doi.org/10.1002/tect.20078">10.1002/tect.20078</a></p>
<ul><li>This article states that the europium anomalies of the greywacke samples suggest provenance from the Sierra Nevada batholith.</li>
</ul><p>Langenheim, V., Jachens, R., Wentworth, C., and McLaughlin, R., 2013, Previously unrecognized regional structure of the Coastal Belt of the Franciscan Complex, northern California, revealed by magnetic data: Geosphere, v. 9, p. 1514-1529. doi:Â <a href="http://dx.doi.org/10.1130/GES00942.1">10.1130/GES00942.1</a></p>
<ul><li><span>Using magnetic data, this article provides an overview of the regional structure of the Franciscan Complex.</span></li>
</ul>
Spatial Coverage
Spatial characteristics of the resource.
These specimens were collected across Marin County and the San Francisco Peninsula.
Temporal Coverage
Temporal characteristics of the resource.
The specimens are Mesozoic in age.
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/.
Title
A name given to the resource
Red Chert
Alternative Title
An alternative name for the resource. The distinction between titles and alternative titles is application-specific.
Jasper
Description
An account of the resource
Red jasper matrix with interescting veins of while quartz. Prominent physcial weathering, brittle areas fall apart to the touch. Several prominent fractures run through the rock, contributing to the weakened structure. Most fresh surfaces are reddish brown while weathered surfaces are brown to orange. (FOV: 0.64mm)
Date
A point or period of time associated with an event in the lifecycle of the resource
Not given
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://www.geosciencecollections.milne-library.org/collections/show/12">Stratigraphic Suite- Franciscan Rocks, California</a>
Identifier
An unambiguous reference to the resource within a given context
FR-3
Spatial Coverage
Spatial characteristics of the resource.
Roadcut on northwest side of Sausalito road east of US 101 and just north of Golden Gate Bridge. It is the first outcrop northeast of the Fort Barry Road
Temporal Coverage
Temporal characteristics of the resource.
N/A
Accrual Method
The method by which items are added to a collection.
Purchased from Western Minerals, Inc.