GSC 110 Lecture Notes - Lecture 15: Clastic Rock, Ooid, Silt
2 Jan 2020
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Document Summary
75% of earths surface is sedimentary: facies the different environments where sediments can accumulate. Sediments can be transported (unlike for example magma) by: water, ice, wind, & gravity: transport & deposition of sediments are initial phases of rock cycle, ultimate fate of most sediment is burial & conversion to sedimentary rock. In spring, inflow of sediment laden water & course sediment, so lighter. Indicative of turbulent flow, movement in the air or water: records wind directions over long periods of time. In sand dunes shows us wind records (like zion, utah) In sand waves on ocean show us the current flows billions of years ago (like death. Chemical sediment: chemical sediment is formed by precipitation of minerals from solution (in water usually) It slowly rises up: called salt domes: avery island in louisiana has salt diapirs, does tobasco peppers, chemical sedimentary rocks result from lithification of organic or inorganic chemical precipitates.
