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12 Cards in this Set
- Front
- Back
What is the dimension, surface configuration, & the structured layout of a rock's particles?
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texture
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What type of rock is formed by squeezing?
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clastic rocks
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What three characteristics do geologists use to identify a rock sample?
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color, texture, and the mineral composition
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What are the three groups that classify rocks?
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texture, mineral composition, and origin
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What methods do geologists use to determine the mineral composition of a rock?
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-Looking at a small sliver
-cut the sliver very thin so they can see through the crystals |
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What is the difference between intrusive & extrusive rocks?
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extrusive-igneous rock formed from lava that erupted on the the surface
intrusive-igneous rock that formed when magma hardened beneath the surface |
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What gives an igneous rock a fine grained or coarse grained texture?
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-rapid cooling forms fine grained
-slow cooling forms coarse grained |
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Once sediment has been deposited, what processes change it into sedimentary rock?
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compaction & cementation
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What are two important organic sedimentary rocks?
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coal & limestone
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What processes form metamorphic rocks?
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collisions between earth's plates can push the rock down toward the heat of the mantle. pockets of magma rising through the crust also help produce metamorphic rocks.
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What is a foliated rock?
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rocks that have their minerals arranged in parallel patterns or bands
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What properties of a rock change when it becomes metamorphic?
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-appearance
-texture -crystal structure -mineral content |