lecture 04 - FOSSIL RECORD I Look at the Geological Time...

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FOSSIL RECORD I Look at the Geological Time Periods again, MEMORIZE o Phanozeric – Eras and periods o Zoic – animals o Archaen – ancient o Proterozoic – proto=earlier o Phanerozoic – phanero=visible, where we see most of the fossils of life o Paleo – old o Meso – middle o Ceno – new How do we integrate across rock layers form independent sites? Abundant type of fossil found in both rock layers o Ex) Foraminifera, marine protozoa, can be found in rocks in high concentration o William Smith – noted that rocks from different locations contained same unique fossil assemblages, reasoned that rocks with same assemblages had been deposited at the same time o Index fossils – abundant fossils with short time range and widespread distribution Fossil bias – not all organisms have an equal chance of being preserved o Soft tissues are rarely preserved; hard parts are preserved much more often o Plants: seeds, pollen o Animals: bones, teeth, shells Modes of preservation
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This note was uploaded on 03/31/2008 for the course BIOEE 2780 taught by Professor Geber during the Fall '07 term at Cornell University (Engineering School).

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lecture 04 - FOSSIL RECORD I Look at the Geological Time...

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