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earth science

TermDefinition
sediments 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 sediments 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 inclined layers of sediments are deposited across a horizontal surface.
clastic sedimentary rocks formed from the abundant deposits of loose sediments that accumulate on earths surface.
clastic rocks are further classified according to the sizes of there particles.
porosity the percentage of open spaces between grains in a rock.
evaporates form in arid regions and in drainage basins on continents that have low water flow.
foliated heat and pressure being applied to rocks.
nonfoliated composed mainly of minerals that form with blocky crystal shapes.
regional metamorphism high temperature and pressure affect large regions of earths crust.
contact metamorphism molten materials such as that an igneous intrusion, comes in contact with solid rocks.
hydrothermal metamorphism very hot water reacts with rocks and alters its chemical and mineral composition.
rock cycle the continuous changing and remaking of rocks
Created by: kgraves167
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