click below
click below
Normal Size Small Size show me how
Sedimentary Rocks
Rocks Rocks and more sediments
Question | Answer |
---|---|
Compaction | the process by which a sediment progressively loses its porosity due to the effects of loading. This forms part of the process of lithification. |
Cementation | the binding together of particles or other things by cement. |
Chemical sedimentary rock | form by precipitation of minerals from water. Precipitation is when dissolved materials come out of water. For example: Take a glass of water and pour some salt (halite) into it. The salt will dissolve into the water. |
organic sedimentary rock | form from the accumulation and lithification of organic debris, such as leaves, roots, and other plant or animal |
Clastic sedimentary rock | are rocks composed predominantly of broken pieces or clasts of older weathered and eroded rocks. |
Sorting | he process by which sedimentary particles become separated according to some particular characteristic, as size or shape. |
Angularity | roundness |
Stratification | is a system or formation of layers, classes, or categories. Stratification is used to describe a particular way of arranging seeds while planting, as well as the geological layers of rocks. |
Cross-bedding | layering within a stratum and at an angle to the main bedding plane. |
Ripple marks | a system of subparallel wavy ridges and furrows left on sand or mud by the action of water or wind, and sometimes fossilized. |
Mud cracks | cracks in mud |
Concretions | a hard solid mass formed by the local accumulation of matter, especially within the body or within a mass of sediment. |