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Chapter 4

ANTH 1210 Chapter 4: Topic 45
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Department
Anthropology
Course
ANTH 1210
Professor
Haskel J.Greenfield
Semester
Fall

Description
l82 dominated by fish, amphibians, primitive reptiles continents at end of Paleozoic 230 MYA, plate tectonicscontinental drift Eurasia slightly separated Mesozoic 23065 MYA o middle life forms o age of the dinosaurs dinosaurs dominated land animal forms 3 periods cretaceous 13565 MYA dinosaurs and birds dominate mammals spread throughout earth reptiles = cold blooded vertebrates do not internally regulate body temperature lay eggs little parental involvement placental and marsupial mammals appear dinosaurs extinct 65 MYA at end of cretaceous meteor hit earth, Yucatan Peninsula, and Gulf of Mexico MesozoicCenozoic Transition Mammals and birds survived and flourished Modern descendants of dinosaurs Cenozoic 65 MYA present o age of flowering plants, mammals, birds o Geologic (within Cenozoic) Paleocene 6554 MYA first major mammal radiation first possible primitive primates o plesiadapoids Eocene
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