What is a non-clastic sedimentary rocks?

Nonclastic sedimentary rocks form from chemical reactions, chiefly in the ocean. Nonclastic and clastic sedimentary rocks are the only members of the rock family that contain fossils as well as indicators of the climate that was present when the rock was formed. read more

Non-clastic sedimentary rocks are evaporites (like salt and gypsum) or precipitates like calcium carbonate (some types of limestone, and travertine). The tricky thing is that sedimentary rocks are not necessarily 100% of one type or the other. read more

Sedimentary rocks can be subdivided into four groups based on the processes responsible for their formation: clastic sedimentary rocks, biochemical (biogenic) sedimentary rocks, chemical sedimentary rocks, and a fourth category for "other" sedimentary rocks formed by impacts, volcanism, and other minor processes. read more