sedimentary rock clastic sedimentary rock ENVO:01000271 2013-10-12T14:51:19Z ORCID:0000-0002-4366-3088 Clastic sedimentary rocks are sedimentary rocks that are composed of silicate minerals and rock fragments that were transported by moving fluids. Clastic rocks are composed largely of quartz, feldspar, rock (lithic) fragments, clay minerals, and mica; numerous other minerals may be present as accessories and may be important locally. ENVO