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15 Cards in this Set
- Front
- Back
Basaltic
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Describes dense, dark colored igneous rock formed from magma rich in magnesium and iron and poor in silica
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Cementation
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Sedimentary rock-forming process in which sediment grains are held together by natural cements that are produced when water moves through rock and soil
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Compaction
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Process that forms sedimentary rocks when layers of sediments are compressed by the weight of the layers above them
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Extrusive
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Describes fine-grained igneous rock that forms when magma cools quickly at or near Earth's surface
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Foliated
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Describes metamorphic rock, such as slate and gneiss, whose mineral grains line up in parallel layers
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Granitic
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Describes generally light-colored, silica-rich igneous rock that is less dense than basaltic rock
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Igneous Rock
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Rock formed when magma or lava cools and hardens
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Intrusive
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Describes a type of igneous rock that generally contains large crystals and form when magma cools slowly beneath Earth's surface
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Lava
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Molten rock that flows from volcanoes onto Earth's surface
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Metamorphic Rock
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Forms when heat, pressure, or fluids act on igneous, sedimentary, or other metamorphic rock to change its form or composition or both
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Nonfoliated
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Describes metamorphic rock, such as quartzite or marble, whose mineral grains grow and rearrange but generally do not form layers
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Rock
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Mixture of one or more minerals, rock fragments, volcanic glass, organic matter, or other natural materials; can be igneous, metamorphic, or sedimentary
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Rock Cycle
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Model that describes how rocks slowly change from one form to another through time
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Sediment
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Loose material, such as rock fragments, mineral grains, and the remains of once-living plants and animals, that have been moved by wind, water, ice or gravity
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Sedimentary Rock
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Forms when sediments are compacted and cemented together or when minerals form from solutions
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