Lab 8 - Metamorphic Rocks (1)

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College of Southern Nevada *

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103

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Geology

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Dec 6, 2023

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Name Section Lab 8: Metamorphic Rock Identification FOLIATION: Number these different foliation types in order of metamorphic grade from lowest (1) to highest (5) Gneissic Migmatitic Phyllitic Schistose Slatey INDEX MINERALS IN FOLIATED METAMORPHIC ROCKS: most foliated rocks are rich in silicate minerals. Some minerals form only in limited pressure and temperature conditions, and so are indicative of a particular metamorphic grade. Use the available Index Mineral chart in your lab reading and list which of these silicate minerals are most likely to be found in these foliated metamorphic types. Some minerals may occur in multiple grades of metamorphic rock: Amphibole Biotite Chlorite Garnet Kyanite Muscovite Pyroxene Sillimanite Staurolite SLATE PHYLLITE SCHIST GNEISS NON-FOLIATED METAMORPHIC COMPOSITIONS: match which minerals are found in which non-foliated metamorphic rocks. Consult the non-foliated metamorphic rock identification chart in your lab reading for assistance. b. Garnet c. Dolomite d. Calcite a. Quartz Amphibolite Quartzite Marble e. Amphibole Metaconglomerate
PARENT ROCK COMPOSITION: fill in likely parent rock(s) for each of the following metamorphic rocks: Use your text chapter or the Metamorphic Rock Identification Charts for assistance. Slate Phyllite Schist Gneiss Migmatite Marble Quartzite Metaconglomerate Hornfels _ Amphibolite Greenstone Anthracite
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