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GEO 101 Igneous Rock Lab Actual study with Questions and correct/verified Answers

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GEO 101 Igneous Rock Lab Actual study with Questions and correct/verified Answers

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GEO 101
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GEO 101








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Institution
GEO 101
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GEO 101

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Uploaded on
May 15, 2025
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Written in
2024/2025
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GEO 101 Igneous Rock Lab Actual study
with Questions and correct/verified
Answers
composition - ANSWER-controlled by plate tectonic movement; dependent on mineral make up
Felsic - ANSWER-white, pink rocks
light-colored minerals (quartz, feldspar, plag)
Intermediate - ANSWER-mixture of light and dark, dark green sometimes
(plag, amphibole)
Mafic - ANSWER-Dark minerals
(amphibole, pyroxene)
Bowen's Reaction Series - ANSWER-Olivine (crystallizes first/melts last)
Pyroxene
Amphibole
Biotite
Felspar
Muscovite
Quartz (crystallizes last, melts first)
Phaneritic - ANSWER-coarse grains, intrusive
Porphyritic - ANSWER-large grains in a fine grain ground mass, extrusive
Aphanitic - ANSWER-fine grained, minerals are too small to see, extrusive
Vesicular - ANSWER-gas bubbles, holes, extrusive
Glassy - ANSWER-•no crystal structure, extrusive
Pyroclastic - ANSWER-fragmented rock composed of ash, lithics, and crystal grains, extrusive
Granite - ANSWER-Phaneritic texture
felsic composition
intrusive
speckled coarse-grained rock
Diorite - ANSWER-Phaneritic texture
intermediate composition

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