W10_103_9c_PaleozoicLife1

W10_103_9c_PaleozoicLife1 - Life in the Paleozoic Ocean...

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Life in the Paleozoic Ocean Planet & The Great Migration Paleozoic Era Age (Myrs) Epoch 0.01 Holocene 1.8 Pleistocene 5.3 Pliocene 23.8 Miocene 33.6 Oligocene 54.8 Eocene 65 Paleocene 144 206 248 290 323 354 417 443 490 543 2500 3800 P r e c a m b r i a n P h a n e r o z o i c Eon Proterozoic Archean Hadean Period Quaternary Tertiary Neogene Paleocene Mississippian C e n o z o i c M e s o z o i c P a l e o z o i c Cretaceous Jurassic Age of the Earth 4600 Myrs (4.6 Byrs) Source: Geological Society of America (1999) Geologic Time Scale Devonian Silurian Ordivician Cambrian Triassic Permian Pennsylvanian 543-248 Myr Early Middle Late
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Skeletons and Shells Small Shelly Fossils (SSF’s) (Very) Late Proterozoic Shells & Skeletons: Advantages of Hard Parts 1. Protection from UV - survive in shallow water 2. Prevents drying out - intertidal zone 3. Predator protection 4. Provides support - inc. size 5. Potential to build reefs Advantage to us - make better fossils!
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Planet Ocean Early Paleozoic Ray Troll Major Animal Phylum All originate in the Early Paleozoic
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Marine Lifestyles Pelagic (“Open Water Dwellers”) Deep or Shallow Benthic (“Bottom Dwellers”)
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This note was uploaded on 01/11/2012 for the course GEO 103 taught by Professor Robviens during the Winter '10 term at Bellevue College.

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W10_103_9c_PaleozoicLife1 - Life in the Paleozoic Ocean...

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