Where do sedimentary rocks come from?

This question could take pages to answer fully. In the simplest terms, sedimentary rocks are formed from either biological process or erosion & transport. Examples of biological rocks are coral reefs, chalk beds and limestone. read more

Sedimentary rocks come from the fragments of pre-existing rocks called sediments. There are three types of sedimentary rocks, each coming from different kinds of sediments. Clastic sedimentary rocks are created from the broken pieces of other rocks, while chemical sedimentary rocks form from mineral crystals like halite and gypsum. read more

Physical weathering (wind, water, ice, sunlight, and gravity) causes rock to break in to tiny fragments called sediments. Erosion causes these sediments to move 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