Browse Items (1651 total)
Sort by:
Muscovite schist
Extremely coarse-grained muscovite schist. Large garnets visible in hand sample. Sillimanite is not recognizable in hand sample, however.
The thin section shows muscovite (with minor sillimanite) in a large band, biotite, staurolite, and…
The thin section shows muscovite (with minor sillimanite) in a large band, biotite, staurolite, and…
Marble
Metamorphised Briarcliff dolostone.
The thin section shows well-twinned dolomite grains with diopside at the bottom.
The thin section shows well-twinned dolomite grains with diopside at the bottom.
Marble
Metamorphised Briarcliff dolostone with visible micas. Contains diopside, tremollite, and phlogopite. At the metamorphic grade of the first sillimanite isograd.
Thin section shows irregular dolomite grains in the center, with pleochroic…
Thin section shows irregular dolomite grains in the center, with pleochroic…
Marble
Metamorphised Balmville limestone with visible phlogopite crystals. Also contains actinolite.
Thin section shows calcite with interspersed pleochroic phlogopite.
Thin section shows calcite with interspersed pleochroic phlogopite.
Marble
Metamorphised Balmville limestone with visible phlogopite crystals. Also contains tremolite visible at the outcrop level. Within nose of anticline of Walloomsac schist.
The PPL thin section shows a large irregular calcite grain with tremolite at…
The PPL thin section shows a large irregular calcite grain with tremolite at…
Wollastonite-garnet-diopside
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…
The…
Barrovian Metamorphic Sequence--Dutchess County, NY Western Minerals Supplementary Information
OCR PDF of supplemental information for the Barrovian Metamorphic Sequence--Dutchess County, NY