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Fossils_and_Metazoans_Lecture

Fossils_and_Metazoans_Lecture - Today Fossilization and...

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Today: Fossilization and Early Metazoans (Chapter 13) Next Time: Stratigraphy (Ch. 13)
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Fossils Types Modes of preservation Bias in the fossil record Early Metazoans Ediacara fossils Burgess Shale fossils The Cambrian explosion Chapter 13: Fossilization and Early Metazoans Next lecture: Chapter 13
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Types of Fossils fossil : evidence of past life body fossil – remains of an organism trace fossil – evidence of what an organism did
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track of reptile footprints burrows Trace Fossils coprolites
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http://www.oceansofkansas.com/ gastroliths Trace Fossils glauconite www.mhhe.com/earthsci/geology/hibbard/glauconite
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1. total preservation 2. mold / cast 3. replacement 1. impression 1. compression Modes of Fossilization
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total preservation: insect in amber http://www.galleries.com/minerals/mineralo/amber/amb-37.jpg Modes of Fossilization
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http://news.nationalgeographic.com/news/2005/ total preservation: frozen mammoth Modes of Fossilization
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external mold cast internal mold mold vs cast Modes of Fossilization
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cast
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