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24 Cards in this Set
- Front
- Back
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What are the 3 big groups of rock
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Igneous, sedimentary, and metamorphic
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Igneous rocks form from
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Lava and magam
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What is formed onto the earth's surface from lava
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Extrusive rocks
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What is an example of extrusive rock
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Basalt
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What type of rock is formed when magma hardened beneath the surface
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Instructive rock
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What is the most common Instructive rock
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Granite
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What does Igneous rock lack
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Crystal structure
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What type of rock is small, solid peices of material that come from rocks or living things
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Sediment
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How are sedimentary rocks formed
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Weathering erosions, deposition, compaction, and cementation
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What is weathering
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The effect of freezing and thawing, plant roots, acid and other forces on rock
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Erosion
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The process by witch running water, wind, or ice carry away bits of broken-up rocks
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What is the process by which sediment styles out of the water or wind carrying it.
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Deposition
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The process that presses sediments together is
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Compaction
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What is the process called in which dissolved minerals crystalizes and glue particles of sediments toghether
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Cementation
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What are the 3 major groups of sedimentary rocks
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Clastic, organic and chemical
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Clastic Rocks
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Formed when fragments are squeezed together
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What is an example of a Clastic Rock
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Shale, sandstone, conglomerate, breccia
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Organic rocks
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Forms where the remains of plants and animals are deposited in layers
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What is an example of an organic rock
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Coal and limestone
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Chemical rocks
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Forms when minerals dissolve in a water solution and crystallize
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Examples of chemical rocks
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Rock salt, limestone made from precipitated calcite
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How does a rock change when great heat and pressure are applied
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Change shape and composition
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Any rock that forms from another rock as a result of changes in heat or pressure (or both) is a _______________ rock
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Metamorphic
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How do Geoligist classify metamorphic rocks
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Acceding to the arrangement of the grains making up the rocks
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