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Rock Terms

Rock Vocabulary Terms

TermDefinition
intrusive or plutonic Rocks that are solidified below the Earth's surface.
extrusive or volcanic Rocks that are solidified above the Earth's surface.
sedimentary rocks Rocks that are composed of sediments.
metamorphic rocks Rocks that have been altered due to heat and pressure.
magma Molten rock formed below the Earth's surface.
lava Molten rock formed on the surface of the Earth.
foliated Mineral crystals that are arranged in parallel bands along which the rock tends to break
unfoliated Mineral crystals are not arranged in parallel bands.
dike Narrow, flat formation of igneous rock formed in cracks in existing rocks.
evaporite Sedimentary rock that is left when water evaporates and leaves behind mineral deposits.
sill Sheet-like mass of igneous rock.
metamorphism Changing of one type of rock into another as a result of heat and pressure.
igneous Rocks formed by the cooling and hardening of molten rock.
rock cycle Continuous changing of rocks from one type to another.
sediments Small pieces of rocks, shells, or the remains of plants and amimals.
compaction Process by which sediments are pressed together to form rocks.
strata Layers of sedimentary rocks.
cementation Process by which sediments are glued together by minerals dissolved in water.
Created by: mswheatley
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