PreservationTaphonomy

PreservationTaphonomy - Preservation and Taphonomy MODES OF...

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Preservation and Taphonomy MODES OF PRESERVATION: A) Original, Unaltered : B) Permineralization : C) Recrystalization : D) Replacement : E) Molds : F) Casts : G) Trace Fossils, Ichnofossils :
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TAPHONOMY (“taphos” = death). This is the study of the fossilization process. Basically, what happens to a specimen from the time when the organism dies to when it is found as a fossil. HARD PARTS vs SOFT PARTS - more likely to find hard parts preserved in the fossil record. Hard Parts Soft Parts Clam Horse
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Common Types of Hard Parts: A) Calcium Carbonate (CaCO 3 ) – 1. Aragonite 2. Calcite - Low Magnesium Calcite - - High Magnesium Calcite – B) Calcium Phosphate C) Opal
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D) Chitin E) Combinations
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Things that impact preservation : 1) Chemical Destruction : a) The original mineralogy LESS STABLE ---> ---> MORE STABLE DISSOLVES QUICKLY ---> DISSOLVES SLOWLY b) The construction c) The environment of preservation
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Chemical Destruction is often selective . 2)
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This note was uploaded on 09/14/2009 for the course GEOL 3410 taught by Professor Staff during the Fall '08 term at Colorado.

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PreservationTaphonomy - Preservation and Taphonomy MODES OF...

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