Chert: Sedimentary Rock - Pictures, Definition, Formation
Chert is a sedimentary rock composed of microcrystallite quartz. It is a tough rock that ancient people used to make tools and weapons. It can be broken to form very sharp edges.SEDIMENTARY ROCKS TEXTURES - Santa Monica College,Sedimentary rocks can be subdivided in three categories: clastic, chemical, and biochemical sedimentary rocks. A. CLASTIC (or DETRITAL) SEDIMENTARY ROCKS Clastic sedimentary rocks form when individual grains (the sediment), made by fragments of rocks, minerals, or shells, are cemented together (the clastic sediemntary rock).Sedimentary Rocks - Tulane University,Sedimentary Rocks. Rivers, oceans, winds, and rain runoff all have the ability to carry the particles washed off of eroding rocks. Such material, called detritus, consists of fragments of rocks and minerals.When the energy of the transporting current is not strong enough to carry these particles, the particles drop out in the process of sedimentation.