1. n. [Geology]

Sediment consisting of broken fragments derived from preexisting rocks and transported elsewhere and redeposited before forming another rock. Examples of common clastic sedimentary rocks include siliciclastic rocks such as conglomerate, sandstone, siltstone and shale. Carbonate rocks can also be broken and reworked to form clastic sedimentary rocks.

See related terms: alluvial,  Bouma sequence,  cubic packing,  detrital,  sediment,  siliciclastic sediment