What are the two main types of sedimentary rock? a. lithified and plutonic b. plutonic and intrusive c. chemical and clastic d. magmic and extrusive pls 25 points

Sedimentary rocks are formed by the accumulation of sediments. There are three basic types of sedimentary rocks.

Clastic sedimentary rocks such as breccia, conglomerate, sandstone, siltstone, and shale are formed from mechanical weathering debris.

Chemical sedimentary rocks, such as rock salt, iron ore, chert, flint, some dolomites, and some limestones, form when dissolved materials precipitate from solution.

Organic sedimentary rocks such as coal, some dolomites, and some limestones, form from the accumulation of plant or animal debris.

Photos and brief descriptions of some common sedimentary rock types are shown on this page.

not always but somethings can be reproduced in a laboratory.