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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?
texture
What type of rock is formed by squeezing?
clastic rocks
What three characteristics do geologists use to identify a rock sample?
color, texture, and the mineral composition
What are the three groups that classify rocks?
texture, mineral composition, and origin
What methods do geologists use to determine the mineral composition of a rock?
-Looking at a small sliver
-cut the sliver very thin so they can see through the crystals
What is the difference between intrusive & extrusive rocks?
extrusive-igneous rock formed from lava that erupted on the the surface

intrusive-igneous rock that formed when magma hardened beneath the surface
What gives an igneous rock a fine grained or coarse grained texture?
-rapid cooling forms fine grained
-slow cooling forms coarse grained
Once sediment has been deposited, what processes change it into sedimentary rock?
compaction & cementation
What are two important organic sedimentary rocks?
coal & limestone
What processes form metamorphic rocks?
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.
What is a foliated rock?
rocks that have their minerals arranged in parallel patterns or bands
What properties of a rock change when it becomes metamorphic?
-appearance
-texture
-crystal structure
-mineral content