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Rocks Vocab

Rocks Vocab-Jordan R.

Sediments loose materials, 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
Sedimentary Rock forms when sediments are compacted and cemented together or when minerals form from solutions
Compaction process that forms sedimentary rocks when layers of sediments are compressed by the weight of the layers above them
Cementation sedimentary rock-forming process in which sediment grains are held together by natural cements that are produced when water moves through rock and soil
Basaltic describes dense, dark colored igneous rock formed from magma rich in magnesium and iron and poor in silica
Intrusive describes a type of igneous rock that generally contains large crystals and forms when magma cools slowly beneath Earth's surface
Lava molten rock that flows from volcanoes on to Earth's surface
Igneous rock formed when magma or lava cools and hardens
Rock Cycle a model to show how slowly rocks change through time
Rock a mixture of such minerals, rock fragments, volcanic glass, organic matter, or other natural materials
Extrusive describes fine-grained igneous rock that forms when magma cools quickly at or near Earth's surface
Foliated describes metamorphic rocks, such as slate and gneiss, whose mineral grains line up in parallel layers
Metamorphic Rock forms when heat, pressure, or fluids act on igneous, sedimentary, or other metamorphic rock to change its form or composition, or both
Nonfoliated describes metamorphic rocks, such as quartzite or marble, whose mineral grains grow and rearrange but generally do not form layers
Granitic describes generally light colored silica-rich igneous rock that is less dense than basaltic rock
Created by: Jordan Raver