Search

Siliciclastic rocks, which include siltstone, sandstone, and conglomerate, are second only to mudrocks in abundance among the world’s sedimentary rock types. They form major reservoirs for water, oil, and natural gas and are the repositories of much of the world’s diamonds, gold, and other precious minerals. In their composition and sedimentary structures, siliciclastic rocks reveal much about paleogeography and, consequently, Earth history.