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20 Cards in this Set

  • Front
  • Back
a solid mixture of crystlas of one or more minerals
The rock cycle
the process by which one rock type changes into another
Sedimentary rock
rocks that are formed when sediments are compacted and cemented together.
weathering, erosion, and deposition lead to formation
Metamorphic rock
formed when the texture and composition of preexisting rock is changed by heat or pressure deep underground

igneous and sedimentary can change into metamorphic
igneous rock
forms from the cooling of magma

magma forms in the earth's lower crust and upper mantle
when magma flows out onto the earth's crust it is called lava
rock classification
based on composition and texture
the minerals that make up the rock
determined by the sizes, shapes and positionbs of the grains by whcih it is made
composed of small grains such as silt and clay
have a texture between coarse and fine-grained rock
contain large grains the size of pebbles
felsic rock
igneous rock

lightwieght (less dense) and light in color
mafic rock
igneous rock

denser and darker then felsic rock
intrusive rock
igneous rock formation

forms when magma cools and solidifies beneath the earth's surface

usually coarse-grained because it cools very slowly
intrusive rock formation

large, balloon-shaped formations that result when magma cools at great depths
extrusive rock
igneous rock formation

forms on earths surface

cools quickly on surface
lave flow
flow of lava emanating from anerupting volcano
long cracks in the earths surface
lava plateau
large amounts of lava emanating from a fissure can cover a vast area forming a plain called lava plateau