| Term | Definition |
| Clastic | sedimentary rock that forms when rock fragments are squeezed together |
| Organic | forms where the remains of plants and animals are deposited in thick layers |
| Chemical | forms when minerals that are disolved ina solution cristallize |
| Erosion | occurs when running water, wind or ice loosen an carry away fragments of rock |
| Sediments | small, solid pieces of mterials that come from rocks or living things and are carried along and deposited by wind and water. Includes mud, sand, pebbles, shells, bone, leaves and stems |
| Deposition | the process by which sediment settles out of the water or wind that is carrying it |
| Compaction | the process that presses sediments together |
| Cementation | the process by which dissolved minerals crystalazation and glue particles of sediment together |