marine sediments GEOL 3377
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This 2 page Class Notes was uploaded by Valeska Guzmán on Monday February 23, 2015. The Class Notes belongs to GEOL 3377 at University of Houston taught by Rosalie Maddocks in Winter2015. Since its upload, it has received 92 views. For similar materials see Introductory Oceanography in Natural Sciences and Mathematics at University of Houston.
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Date Created: 02/23/15
Why and where sediments occur Understand bathymetry of ocean marine processes Ocean crust going crust young which means crust sediments are young Stratigraphic records are interrupted mostly use correlation Deep sea sediments Cenozoic Jurassic 180 million years of earth history Detritic vs pelagic Neritic conditions in uenced by continents Classi cation by particle Hydrogenous aqueous solution Neritic dark brown located around edge of continent passive continental margins accumulation of sediments continental shelve and slope Most sedimentslithogenous 756 of ocean oor oor biogenous very low sedimentary rates Biological productivity dissolution rate material being dissolved goes to deeper water Dilution by terrigenous lithogenous clastic overcomes what is being produced by hydrogen biogenous process far from continents Terrigenous from land erosional products exposed to weathering and atmosphere Rocks exposed to water chemical reactions These processes go on surface temperatures industrial setting a lot of c02 Plant and animals on surface produce on soil various organic acids are produces interacts with the rock cycle 02 reacts with reduced compounds oxidizes ion chemical weathering more important in warm and small humid climates Silicate minerals react easily Chemical weathering feldspar cations k al clay minerals silica in solution Chemical weathering inland material in solution goes down to ocean and sea Sediments have a lot of chemical weathering ferromagnetism produce cations soluble silica Nonferromagnetism cations silica Only mineral that doesn39t react is quartz Color does give us information Pyrite low oxygen condition within sediment where it is accumulated All oxygen used by decay bacteria elemental for carbon production lon carbonate colorless reduced Conditions below sea oor Oxygenation best done in rain terrestrial weathering Texas is composed of a lot of red ground These sediments in marine water don39t react very much Sedimentologists measure sand grains particles perfect spheres or not Larger particles dropped rst more able to carry stuff if already in suspension Clay particles tend to stick to one another Glacier erodes a landscape Glacial till ice debris left behind Wind can only carry nest size particle Clay mineras produced by chemical weathering Sediment gets trapped at that rate of sedimentation sediments get buried digenetic after deposition Abyssal clay deep 2000 meters Zeolites red silicates Autogenic authentic origin grew in place Volcanic ash plus seawaterclay Trenches capture sediments none of it reaches central paci c Lowest sediments abyssal clay Abyssal basins abyssal clay light brown Plankton oat on water Protest single cell organisms
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