Sediments are subdivided into three types:
Sediments are classified on the basis of the origin, size and mineralogical composition of the particles. They are produced by the action of weathering and erosion that break down pre-existing rocks by physical and chemical processes. The sediment is then transported by wind, water or ice to the site of deposition.
The character of the sediment is determined by the extent of weathering and the type and distance of transportation. Some sediments are weathering in place with little or no transport (eg. laterites). Others may be transported over vast distances from mountain top to ocean.
The transport agents wind, water and ice generate distinctive sediments that can be identified by the extent of particle abrasion and the degree of sorting.