1. Clastic sedimentary rocks: These are formed from fragments of other rocks (clasts) that have been weathered, transported, and deposited. They are further classified by grain size:

* Conglomerate: Large, rounded clasts (gravel)

* Breccia: Large, angular clasts (gravel)

* Sandstone: Medium-sized clasts (sand)

* Siltstone: Fine-grained clasts (silt)

* Claystone or Shale: Very fine-grained clasts (clay)

2. Chemical sedimentary rocks: These are formed from the precipitation of minerals from a solution, usually water. Examples include:

* Rock salt (Halite): Formed from the evaporation of seawater.

* Gypsum: Formed from the evaporation of seawater or lakes.

* Limestone: Formed from the accumulation of shells and other marine organisms.

* Chert: Formed from the precipitation of silica.

3. Organic sedimentary rocks: These are formed from the accumulation of organic material, such as plant and animal remains. Examples include:

* Coal: Formed from the accumulation of plant material in swamps.

* Oil shale: Formed from the accumulation of algae and other organic matter.

* Bituminous coal: Formed from the accumulation of plant material in swamps.

It's important to note that these are just broad categories, and there are many subcategories within each type.