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Chapter 6
Term | Definition |
---|---|
Sediment | Are small pieces of rock that are moved and deposited by water, wind, glaciers, and gravity. |
Lithification | The Physical and Chemical processes that transforms sediments into sedimentary rocks. |
Cementation | Occurs when mineral growth glues sediment grains together into solid rock. |
Bedding | Primary feature of sedimentary rocks is horizontal layering. |
Graded bedding | Is often observed in marine sedimentary rocks that were deposited by underwater landslides. |
Cross bedding | Formed as inclined layers of sediments are deposited across a horizontal surface. |
Clastic Sedimentary rocks | Are formed from the abundant deposits of loose sediments that accumulated on Earths surface. |
Clastic | These rocks are further classified according to the sizes of their particles. |
Porosity | Is the percentage of open spaces between grains in a rock. |
Evaporite | Most commonly form in arid regions and in drainage basins on continents that have low water flow. |
Foliated | Layers and bands of minerals, metamorphic rocks. |
Nonfoliated | Metamorphic rocksare composed mainly of minerals that form with blocky crystals shapes. |
Regional metamophism | High temperature and pressure affect large regions of Earths crust they produce large belts. |
Contact metamophism | Molten material, such as that in a igneous intrusion, comes in contact with solid rock, a local affect. |
Hydrothermal metalmorphism | Very hot water reacts with rock and alters its chemical and mineral compositions. |
Rock cycle | Continuous changing and remaking of rocks. |