Chapter 1: New World Beginnings (33,000 B.C. ? A.D. 1769) The Shaping of North America 225 million years ago ? supercontinent w/ all world?s dry land break away into continents & oceans earth?s crust shifts and folds, forms mountain ranges ex. Appalachians, Rockies, Sierra Nevada, Cascades, Cost Ranges 10 million years ago ? North America basic shape formed Canadian Shield Great Ice Age 2 million years ago 10,000 years ago ? glaciers retreat Canadian Shield is depressed, topsoil gone Great Lakes filled Peopling the Americas most come by land, some by boat 35,000 years ago ? Ice Age fuse oceans, lower sea level land bridge from Eurasia N. America in Bering Sea Asian hunters, nomads, cross to Americas sea level rise after Ice Age over isolate Americas
American Pageant 13th edition Chapter 1 Notes
Chapter 1: New World Beginnings (33,000 B.C. ? A.D. 1769) The Shaping of North America 225 million years ago ? supercontinent w/ all world?s dry land break away into continents & oceans earth?s crust shifts and folds, forms mountain ranges ex. Appalachians, Rockies, Sierra Nevada, Cascades, Cost Ranges 10 million years ago ? North America basic shape formed Canadian Shield Great Ice Age 2 million years ago 10,000 years ago ? glaciers retreat Canadian Shield is depressed, topsoil gone Great Lakes filled Peopling the Americas most come by land, some by boat 35,000 years ago ? Ice Age fuse oceans, lower sea level land bridge from Eurasia N. America in Bering Sea Asian hunters, nomads, cross to Americas sea level rise after Ice Age over isolate Americas
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