8_sediment distribution - Sediment distribution 4 different...

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Unformatted text preview: Sediment distribution 4 different types of sediment: 1. Lithogenic/terrigenous A. Rivers: delivers most terrigenous sediment to ocean in general Grainsize decreases and sorting increases away from continents Only finest grains reach the abyssal plains B. Wind: delivers most terrigenous sediment to middle of ocean/abyssal plains Only very fine gains iron rusts in dust to produce red clay C. Ice: Delivers coarsest grains to the abyssal plains Poorly sorted and mostly occurs near the high latitudes 2. Authigenic Precipitates out of seawater so Manganese nodules only occur where there is very little sediment deposited (abyssal plains) 3. Cosmogenic Falls everywhere in very small concentrations Best way to find Fe-Ni spherules = magnet + red clay 4. Biogenic (MOR) Production versus dissolution Thurman, fig 5-23 A B C D 1. Region where river delivered sediment is most likely to occur?...
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This note was uploaded on 12/03/2010 for the course ENVIRON GS 222/ENV taught by Professor Ingridhendy during the Fall '10 term at University of Michigan.

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8_sediment distribution - Sediment distribution 4 different...

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