Sedimentary Rock Examples
The table below shows examples of common clastic sedimentary rocks. They are listed by grain size in decending order. Grain size is one factor in classifying sedimentary rocks.Clicking on the name of the rock will bring up a larger picture and a description of the rock type in a new window.
The table below shows examples of common chemical sedimentary rocks. Clicking on the name of the rock will bring up a larger picture and a description of the rock type in a new window.
Examples of Chemical Sedimentary Rocks
| ||Halite is made when a body of seawater becomes closed off and evaporates. As the water evaporates it the remaining water can no longer hold the same amount of salt. The salt precipitates out and is deposited as crystallized halite or rock salt. |
| ||gypsum is an evaporate made of calcium sulfate that has many forms. Clear flattened crystals are called selenite. Satin spar and alabaster are also common forms of gypsum.|
| ||Limestone is made primarily of calcium carbonate or calcite. The most common source of this calcite is the shells of marine organisms. |
| ||Fossiliferous Limestone is limestone that contains the remains of ancient plants or animals in the form of fossils.|
| ||Chert is a microcrystaline sedimentary rock that is silica rich. It has many forms and colors.|
Organic Sedimentary Rocks
| ||Coal is composed of organic matter in the form of plant fragments. Coal can be:|
- Lignite is black and has a crumbly consistency.
- Bituminous coal can be dull to shiny and black.
- Anthacite is usually considered metamorphic
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