Earth Sciences 4462A/B Lecture Notes - Lecture 4: Ice Rafting, Belemnitida, Bioturbation
16 Oct 2015
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Document Summary
The growth and decay of continental ice sheets are re ected in the oxygen isotopes of. Deep sea cores can record continuous deposition in nearly complete sequences, unlike foraminifera in deep sea sediments, ice rafted debris, and wind blown dust terrestrial sequences that are commonly incomplete with unconformities. Forams: make calcareous tests using oxygen in the ocean water and can indicate global i"ve volumes through the ratio of oxygen isotopes measured in their tests. In the lab, forams are extracted from cores and analyzed by mass spectrometry to give s18o. Termination ii represents the peak of last interglacial; matches s18o) substage 5e.
