Faunal Assemblages

Faunal Assemblages - GLY 6075 A Ned A Palmiotto E Pugh M Wylde 01 October 2010 Once living organisms found in the geologic record that indicate

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Unformatted text preview: GLY 6075 A. Ned, A. Palmiotto, E. Pugh, M. Wylde 01 October 2010 Once living organisms found in the geologic record that indicate environmental conditions Mainly foraminifera but also diatoms and radiolarians Foraminifera are used to estimate Sea Surface Temperatures (SST) Secrete their test from ocean water, recording the environmental conditions Foraminifera are protozoan forms of calcium carbonate shells measuring 10s to 100s microns in diameter Globigerinoides ruber Planktonic ◦ Surface-dwelling @ 0 – 200 m Benthonic ◦ Deep sea-dwelling @ > 200 m Affected by: ◦ Water temperature, nutrients, and salinity Forams are picked from sediment sample Species abundance are the subject of the proxy studies Core-top – the top most section of the sediment sample (modern sections) Down-core – the bottom section of the sediment sample, increasing age downward...
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This document was uploaded on 07/08/2011.

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Faunal Assemblages - GLY 6075 A Ned A Palmiotto E Pugh M Wylde 01 October 2010 Once living organisms found in the geologic record that indicate

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