click below
click below
Normal Size Small Size show me how
6-2 Sediment Types
6-2 Types of Sedimentary Rocks
Term | Definition |
---|---|
Clastic | The most common sedimentary rocks, formed from abundant deposits of loose sediments accumulated on the Earth's surface |
Coarse-Grained Rocks | Sedimentary rocks consisting of gravel-sized rock and gravel fragments |
Conglomerate | Transportation rounds and abrades the gravel while particles scrap against each other. Lithification turns them into these. |
Breccia | Composed of angular, gravel-sized particles - indicates that the sediments from their formation did not have time for their rounding |
Porosity | Percentage of open spaces between grains in rocks |
Fine-Grained Rocks | Sedimentary rocks consisting of silt and clay-sized particles |
Evaporites | Layers of chemical sedimentary rocks formed in arid regions and drainage basins on continents with low water flow |
Biochemical Sedimentary Rocks | Formed from the remains of once-living organisms |