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ES Vocab Ch6

TermDefinition
Sediment Small pieces of rock that are moved and deposited by water, wind, glaciers, and gravity.
Lithification The physical and chemical processes that transform sediments into sedimentary rocks.
Cementation When mineral growth glues sediment grains together into solid rock.
Bedding The primary feature of sedimentary rocks is horizontal layering.
Graded Bedding Bedding in which the particle sizes become progressively heavier and coarser toward the bottom layers.
Cross-bedding Formed as inclined layers of sediment are deposited across a horizontal surface.
Clastic Sedimentary Rock Formed from the abundant deposits of loose sediments that accumulate on earths surface.
Clastic Comes from the greek word klastos, meaning broken.
Porosity The percentage of open spaces between grains in a rock.
Evaporite Form in arid regions and in drainage basins on continents that have low water flow.
Foliated Layers and bands of minerals.
Nonfoliated Composed mainly of minerals that form with blocky crystal shapes.
Regional Metamorphism When high temperature and pressure affect large regions of earths crust.
Contact Metamorphism When molten material such as that in an igneous intrusion, comes in contact with solid rock.
Hydrothermal Metamorphism When very hot water reacts with rock and alters its chemical and mineral composition.
Rock Cycle The continuous changing and remaking of rocks.
Created by: Alayna Long