GEO 303 Chapter Notes - Chapter 4: Evaporite, Particle Size, Coquina
24 Dec 2017
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Deposited at earth"s surface by water, wind, glacier ice, or biochemical processes under. Typically deposited in strata (layers) at the earth"s surface. sedimentary. Form by lithification and diagenesis of sediments that have been weathered, the influence of gravity. Transported, and deposited from preexisting igneous, sedimentary, or metamorphic rocks. There are two categories of sedimentary rocks, terrigenous clastic and. Chemical, physical and biological changes to sediment and sedimentary rock . Lower than for deposition, not including weathering. metamorphism. Develop in fine-grained sediment exposed to drying for an extended. Terrigenous clastic: made up of clasts (broken-off particles) and cement. Quartz is most resistant to chemical weathering. Note: maturity does not refer to older or younger rock. angular clasts = immature. Precipitate inorganically as ion concentration rises in a drying body of water. [ca,mg (co 3 )]- mg partially replaces ca in limestone during diagenesis. fizzes a little bit. crystal structure similar to calcite (caco3)
