16-KT-boundary - 460:206 DINOSAURS End of the Cretaceous:...

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End of the Cretaceous: Destruction of the Dinosaur Ecosystem 460:206 DINOSAURS
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Cretaceous: “The Chalk” White Cliffs Dover K = Cretaceous ( Kreide ) K/T or K/P (Paleogene) boundary: 65 Ma The Earth had a very bad day Cretaceous/Paleogene Boundary
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Plesiosaurs and Mosasaurs
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Ammonoid cephalopods
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Rudists
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severely affected planktonic foraminifers: three species survived out of >23 Guembelitria cretacea , Hedbergella monmouthensis, H. holmdelensis nannofossils
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Pterosaurs
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Cretaceous/Paleogene (K/P) boundary extinction of 25% of families, 50% species Dinosaurs, marine reptiles, flying reptiles ammonites and belemnites Rudists (reef builders) 75% marsupials planktonic foraminifers: three species survived out of >23 Nannofossils 90+% extinction coral, bivalves, gastropods, bryozoans severely affected not affected: most land plants?? crocodiles, lizards, snakes, turtles survived
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"Extraterrestrial cause for the Cretaceous-Tertiary extinction." Helen Michel Frank Asaro Walter and Luis Alvarez
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Alvarez Team 1980 Revamps Gradualism
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http://palaeo.gly.bris.ac.uk/Communication/Lee/irspike.html
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This note was uploaded on 02/18/2011 for the course DINOSAURS 206 taught by Professor Neitzke during the Spring '11 term at Rutgers.

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16-KT-boundary - 460:206 DINOSAURS End of the Cretaceous:...

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