CH04_Outline part2

CH04_Outline part2 - Salt deposits Halite(sodium chloride...

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2/28/11 Salt deposits: Halite (sodium chloride NaCl): both natural and man-made deposits Fig. 4.25
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2/28/11 Mediterranean Sea dried out 5-6 million years ago, leaving 4000 meter thick layer of salt on the bottom. Also happened in Gulf of Mexico 240 million years ago when Pangeae started to break up. This process helps control the salinity of the global oceans.
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2/28/11 Retrieving sediments Dredge Gravity corer Rotary drilling First: Deep Sea Drilling Program (DSDP) Then: Ocean Drilling Program (ODP) Now: Integrated Studies reveal support for plate tectonics, drying of the Mediterranean Sea, global climate change
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2/28/11 04_E
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2/28/11 End of CHAPTER 4 Marine Sediment s Fig. 4E
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Sediment texture Grain size Proportional to energy of transportation and deposition Table 4.2
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2/28/11 Sediment texture Grain size sorting Indication of selectivity of transportation and deposition processes Textural maturity Increasing maturity if Clay content decreases Sorting increases Non-quartz minerals decrease
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2/28/11 Sediment maturity Fig. 4.7
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