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NS140 Chapter 3

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QuestionAnswer
Which of the following statements is correct regarding how rocks form? The process of weathering involves the breakdown of existing rocks.
A rock was broken by wind, water, and ice, then buried and heated, causing its minerals to change. It is now a(n) _____ rock. metamorphic
Which of the following statements distinguishes metamorphic rock from igneous rock? Metamorphic rock forms without completely melting.
Which of the following describes basalt? very finely crystalline
Numerous flows of which type of rock have spread across Yellowstone Volcano, largely filling in its central crater? felsic
Why are komatiites rare on Earth's surface today? Ultramafic magma is too dense to reach the surface.
Sedimentary rocks cover which percentage of Earth's surface (including beneath the oceans) ? 75
The Great Salt Lake has no outlet. Based solely on this consideration, which specific type of sedimentary rock is more common there, in comparison to a lake with an outlet? chemical
Suppose a geologist finds predominantly peloids, not ooids, in a body of water. This is specifically consistent with which of the following hypotheses? The body of water has flowed slowly for many years.
Chert has been used as a geological resource for which of the following purposes? arrowheads
Of the following statements, one is false. Which one? Limestone rock is commonly emitted directly from volcanoes. Sedimentary rock, of course, forms beneath water and is not emitted by volcanoes.
Which of the following statements can be said of sedimentary structures? Most sedimentary structures form through the interaction of moving water and loose grains of sediment.
Suppose a geologist is testing whether a region is within a floodplain. Which of the following sedimentary structures would be specifically useful in this context? mud cracks
Suppose a geologist is testing whether an ancient region experienced a flood. Which of the following sedimentary structures would be specifically useful in this context? graded beds
Describe the occurrence of gravel in the U.S. Gulf Coast region, in comparison to Washington State. There is very little gravel in the U.S. Gulf Coast region, and gravel is common in Washington State.
Which of the following is an example of metamorphism? baking of a clay vase in a kiln to make ceramic
Which of the following is the most important factor in metamorphism? temperature
Among the following options, which is the highest grade metamorphic rock? a rock between about 40 and 55 kilometers beneath Earth's surface
Which of the following is the process of foliation? crystal growth with their flat surfaces perpendicular to the direction of squeezing
Which of the following types of metamorphism occurs today in the sediments underlying many large deltas? burial
Created by: robynlee
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