ESS 330 Lecture 4: Marine Sediments2
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Department
Geology and Astronomy
Course
ESS 330
Professor
Yong Hoon Kim
Semester
Spring

Description
Neritic Deposits Dominated by lithogenous sediment, may contain biogenous sediment Carbonate Deposits Carbonate minerals containing CO 3 Marine carbonates primarily limestone CaCO 3 Most limestones contain fossil shells Suggests biogenous origin Ancient marine carbonates constitute 25 of all sedimentary rocks on Earth. Carbonate Deposits Stromatolites Fine layers of carbonate Warm, shallowocean, high salinity Cyanobacteria Lived billions of years ago Calcareous Ooze and the CCD CCD Calcite compensation depth Depth where CaCO re3dily dissolves Rate of supply = rate at which the shells dissolve Warm, shallow ocean saturated with calcium carbonate
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