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Ice ages

Geological Time Scale

Subject: 
Environmental Science
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Historical geology
Phanerozoic
Geologic time scale
Glaciology
Cenozoic
Ice ages
Climate history
Quaternary
Pleistocene
Epoch
Pliocene
Quaternary glaciation
Environment
Tags: 
Geologic time scale
Phanerozoic
Historical geology
Planetary science
Climate history
Extinction events
Geological history of Earth
Cenozoic
Cretaceous
Permian
Pleistocene
Mesozoic
Environment
geology time scale geologic eon epoch

Eon Era Period Epoch Major Events Phanerozoic Cenozoic Quaternary (0-1.6 million yrs BP) Holocene (Present-10,000 yrs) Modern humans develop. Pleistocene Ice Age Interglacial. Pleistocene (10,000 -1,600,000 yrs) Pleistocene Ice Age. Extinction of many species of large mammals and birds. Tertiary Pliocene (1.6-5.3 million yrs) Development of hominid bipedalism. Cascade Mountains began forming. Climate cooling. Miocene (5.3-24 million yrs) Chimpanzee and hominid lines evolve. Extensive glaciation in Southern Hemisphere. Climate cooling. Oligocene (24-37 million yrs) Browsing mammals and many types of modern plants evolve. Creation of the Alps and Himalaya mountain chains. Volcanoes form in Rocky Mountains. Eocene

Chapter 1 Notes

Subject: 
US History
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Geology
Historical geology
Physical geography
Glaciology
Geology of Minnesota
Supercontinents
Climate history
Ice ages
Canadian Shield
Bering Sea
Americas
Continent
Environment

Chapter 01 - New World Beginnings---33,000 B.C.-A.D. 1769. ?I. The Shaping of North America 1. 225 million yrs. ago supercontinent 2. Mountains-- Appalachians pre separation, all others after making them ?American? mountains. 3. Canadian Shield- NE corner of Americas, maybe first above sea level 4. Ice Age- 2 million yrs. ago--2 mile thick ice, Canada, N. America 5. Glacial action eroded Canadian Shield II. Peopling the Americas 1. The Land Bridge-- Sea level dropped because of glaciers exposing a land bridge. ? ? Bering Sea between Siberia and Alaska 2. Nomadic hunters following migratory game herds 3. Ice Age ended, glaciers melted, land bridge under water--10,000 yrs. ago 4. When Europeans arrived in 1492-- 54 million people lived in the Americas.
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