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chapter 6 KS
vocab
| Term | Definition |
|---|---|
| Sediments | small pieces of rock that are moved and deposited by water, wind, glaciers, and gravity |
| Lithification | the physical and chemical process 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 when abundant deposits of loose sediments that accumulate on Earth's surface |
| Clastic | comes from the Greek work klastos, meaning broken |
| Porosity | the percentage of open spaces between grains in a rock |
| Evaporites | layers of chemical sedimentary rocks form |
| Foliated | layers and bands of minerals |
| Nonfoliated | rocks that are composed mainly of minerals that form with blocky crystal shapes. |
| Regional Metamorphism | when high temperatures and pressure affect large regions of Earth's 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 conposition |
| Rock Cycle | the continuous changing and remaking of rocks |