Paleogeography of North America Images by: Dr. Ron Blakey Professor of Geology Northern Arizona University

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Presentation transcript:

Paleogeography of North America Images by: Dr. Ron Blakey Professor of Geology Northern Arizona University (All images © Ron Blakey) Images incorporated into Powerpoint by Steve Perrin

Late Precambrian 550 Ma (Million Years Ago)

Middle Cambrian 510 Ma

Late Cambrian 500 Ma

Early Ordovician 485 Ma

Middle Ordovician 470 Ma

Late Ordovician 450 Ma

Early Silurian 430 Ma

Late Silurian 420 Ma

Early Devonian 400 Ma

Middle Devonian 385 Ma

Late Devonian360 Ma

Early Mississippian 345 Ma

Late Mississippian 325 Ma

Early Pennsylvanian 315 Ma

Late Pennsylvanian 300 Ma

Early Permian 290 Ma

Middle Permian 275 Ma

Late Permian 260 Ma

Early Triassic 245 Ma

Middle Triassic 230 Ma

Late Triassic 210 Ma

Early Jurassic 195 Ma

Early Jurassic 180 Ma

Middle Jurassic 170 Ma

Late Jurassic 150 Ma

Early Cretaceous 140 Ma

Early Cretaceous 130 Ma

Early Cretaceous 115 Ma

Late Cretaceous 100 Ma

Late Cretaceous 85 Ma

Late Cretaceous 75 Ma

Cretaceous-Tertiary 65 Ma

Paleogene Paleocene 60 Ma

Paleogene Eocene 50 Ma

Paleogene Eocene 40 Ma

Paleogene Oligocene 25 Ma

Neogene Miocene 15 Ma

Neogene Miocene 8 Ma

Neogene Pliocene 3 Ma

Quaternary Glacial 126,000 Years Ago

Present

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