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Rocks and Minerals
| Term | Definition |
|---|---|
| porosity | amount of pore space in a rock or soil |
| Deposition | When sediments are deposited or dropped in a new location |
| Erosion | Wind, water and ice move sediments |
| Sediments | small pieces of broken down rock and mineral fragments |
| sedimentary rock | rocks made from sediments |
| Lithification | hardening of sediment into rock through compaction and cementation |
| compaction | pressure |
| Cementation | stuck together with natural glue |
| metamorphic rock | rock formed from another rock by heat and pressure |
| parent rock | The existing rock that turns into a metamorphic rock |
| Igneous rock | rock formed from cooling magma or lava |
| Intrusive igneous rock | Rock formed below the surface from magma cooling |
| Extrusive Igneous rock | Rock formed above the surface from lava cooling |
| Weathering | wind, water and ice break down rocks |
| rock | a naturally occurring solid made from mineral pieces or rock fragments |
| mineral | a naturally occurring solid with a crystal structure and a definite chemical composition |
| ore | a mined deposit that make a profit |
| rock cycle | a continuous series of events through which a rock is transformed from one type to another |
| permeability | how easily water move through a rock or soil |
| loess | wind blown silt or dirt |
| loam | mixed dirt, pebbles, sand and rocks |
| cleavage | when a mineral breaks on a flat surface |
| felsic | igneous rock light in color |
| mafic | igneous rock dark in color |
| coarse grained | igneous rock with a rough texture, takes a longer time to cool |
| fine grained | igneous rock with a smooth texture, cools quickly |
| strata | layers in a sedimentary rock |
| stratification | Process of making layers in a sedimentary rock |
| organic | sedimentary rock made from the remains of dead plants and animals |
| Contact metamorphism | metamorphic rocks are created from the heat given off by nearby magma |
| Regional metamorphism | metamorphic rocks are created from the pressure involved in plate tectonics |
| Foliated | metamorphic rock that has aligned grains of flat minerals - looks like colored bands |
| uplift | The process that moves large amounts of rock up to Earth's surface or higher |
| streak | the color of a mineral's powder |
| AMD | Acid Mine Drainage |
| reclamation | when a mine is no longer used, the land should be returned to its original state or better |
| mining | extracting ore from the ground |