Exam One Geology 401 Review

Exam One Geology 401 Review - C) Mafic Answer [More felsic...

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Exam One Geology 401 Review 27/09/2010 08:09:00 Question#1 The Earth’s mantle is dominantly composed of: A) Molten (liquid) rock [Solid Rock] B) Iron and nickel [Inner Core and Outer Core Composed of These] C) Basalt D) Peridotite   Answer [Low Silicon Percentage (-45%) Olivine, Pyroxene] Question #4 The base of the lithosphere is defined by a change in _______. B) Density C) Strength [Lithosphere is strong, asthenosphere is weak] D) All of the above  Question #13  Which of the following magma compositions will be produced by partial melting of  the upper mantle? A) Felsic B) Intermediate
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Unformatted text preview: C) Mafic Answer [More felsic than parent rock, so ultramafic Mafic] D) Ultramafic Question #16 If you were to melt a rhyolite, which of the following minerals would be the last to melt? A) Orthoclase feldspar B) Olivine [No olivine in rhyolite, b/c its a very felsic rock] C) Biotite Mica Answer D) Amphibole Question #40 Large area with quartzite, most likely environment that existed before area was metamorphosed? A) Desert sand dunes Answer [Metamorphic rock] B) Coral reef C) Ocean floor D) Volcano 27/09/2010 08:09:00 27/09/2010 08:09:00...
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Exam One Geology 401 Review - C) Mafic Answer [More felsic...

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