ERTH 111 Exam Questions And Answers
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Felsic - Answer✔✔light colored, low density minerals, forms last at low temperatures
Mafic - Answer✔✔dark colored, higher density minerals
Form First at high temperatures
Intermediate - Answer✔✔between felsic and mafic
Ultramafic - Answer✔✔90% mafic minerals
Slate - Answer✔✔Flat, dull layers, metamorphic. Protolith: Shale
Phyllite - Answer✔✔Metamorphic, wavy, shiny layers Protolith:Slate
Schist - Answer✔✔Metamorphic, wavy layers with visible minerals Protolith: Phyllite
Gnessis - Answer✔✔metamorphic: alternating layers of dark and light minerals Protolith: Schist
or Granite/Diorite
Marble - Answer✔✔Metamorphic, Recrystallized calcite Protolith: Limestone
Quartzite - Answer✔✔Metamorphic: Recrystallized Quartz Protolith:Sandstone
Coal - Answer✔✔sedimentary rock formed from decayed plant material; the world's most
abundant fossil fuel
Coquina - Answer✔✔A sedimentary rock made from fossilized seashells stuck together.
Chalk - Answer✔✔forms from compaction of cocoliths
Mud - Answer✔✔Sedimentary, too small too see individual particles, Made from mudstone or
shale (layered mudstone)
Sand - Answer✔✔Sedimentary, small individual particles, from sandstone
Gravel - Answer✔✔Sedimentary, large individual particles, made from conglomerate
Boulders - Answer✔✔sedimentary, massive individual particles, made from Breccia
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