Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus, chunks, and smaller...

formed by impacts, volcanism, and other minor processes. Clastic sedimentary rocks are composed of rock fragments (clasts) that have been cemented together...

A clastic dike is a seam of sedimentary material that fills an open fracture in and cuts across sedimentary rock strata or layering in other rock types...

Arenite (from the Latin arena, "sand") is a sedimentary clastic rock with sand grain size between 0.0625 mm (0.00245 in) and 2 mm (0.08 in) and containing...

In geology, a clastic wedge is a thick accumulation of sediments or sedimentary rocks eroded and deposited landward of a mountain chain or geological...

the genetic affiliation of a clastic rock. The degree of roundness points to the range and mode of transport of clastic material, and can also serve as...

Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin...

detector is very sensitive, and the amount of radiation is very low. In clastic rock formations, rocks with smaller amounts of radiation are more likely to...

alluvium. This alluvium is adjacent to and probably underlain by volcanic clastic rock deposited by Mount Shasta in the course of its development. Groundwater...

Monica fault zone. The central block contains both marine and non-marine clastic rock units interbedded with volcanic rocks that are late Cretaceous to Pliocene...