Paléogéographie de l'Amérique du nord

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

2 Late Precambrian 550 Ma (Million Years Ago):



3 Middle Cambrian 510 Ma:



4 Late Cambrian 500 Ma:



5 Early Ordovician 485 Ma:



6 Middle Ordovician 470 Ma:



7 Late Ordovician 450 Ma:



8 Early Silurian 430 Ma:



9 Late Silurian 420 Ma:



10 Early Devonian 400 Ma:



11 Middle Devonian 385 Ma:



12 Late Devonian360 Ma:



13 Early Mississippian 345 Ma:



14 Late Mississippian 325 Ma:



15 Early Pennsylvanian 315 Ma:



16 Late Pennsylvanian 300 Ma:



17 Early Permian 290 Ma:



18 Middle Permian 275 Ma:



19 Late Permian 260 Ma:



20 Early Triassic 245 Ma:



21 Middle Triassic 230 Ma:



22 Late Triassic 210 Ma:



23 Early Jurassic 195 Ma:



24 Early Jurassic 180 Ma:



25 Middle Jurassic 170 Ma:



26 Late Jurassic 150 Ma:



27 Early Cretaceous 140 Ma:



28 Early Cretaceous 130 Ma:



29 Early Cretaceous 115 Ma:



30 Late Cretaceous 100 Ma:



31 Late Cretaceous 85 Ma:



32 Late Cretaceous 75 Ma:



33 Cretaceous-Tertiary 65 Ma:



34 Paleogene Paleocene 60 Ma:



35 Paleogene Eocene 50 Ma:



36 Paleogene Eocene 40 Ma:



37 Paleogene Oligocene 25 Ma:



38 Neogene Miocene 15 Ma:



39 Neogene Miocene 8 Ma:



40 Neogene Pliocene 3 Ma:



41 Quaternary Glacial 126,000 Years Ago:



42 Present:




Trouvé ici.


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