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Biostratigraphic correlation : simplified

November 23, 2010 Comments off

Summary: This can be used to correlate rocks by looking at the sequence of zone fossils, if 2 widely separated rock units contain a sequence of identical zone fossils; they have the same relative age. Read more…

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Oxygen Isotope Level

November 16, 2010 2 comments

Summary: These can help tell geologists temperature changes through time. Read more…

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