OCS 1005 Chapter : End Of Chapter 5
15 Mar 2019
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Document Summary
Neritic on continental margins, 75% of marine sediment, rapid deposition. Oceanic 50% of wind blown fine clay. Particle settling rate sand 1. 8 days silt 185 days clay 51 years. Dissolution rate calcerous sediments dissolve as they go deeper. Carbonate compensation depth below the ccd, the watter is cold and hols more carbonic acid which dissolves the carbonate shells as they slowly fall to the bottom. Silaceous oozes - at depths greater than 4500 m,, dominant oozes are derived from the silica shells of diatoms and radiolarian. Silaceous oozes cover about 14% of the ocean basins. Deep ocean floor = 78% of ocean, only holds 13% of sediments. Ptolemy revised earth circumference and was wrong, much smaller. Hms challenger disproves that there is no life in the deep ocean. Fram proves the artic is not a continent. Concept of density ocean vs continental crust.
