Ice ages , long periods of reduction in the temperature of the Earth 's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers . Earth's climate alternates between ice ages and greenhouse periods , during which there are no glaciers on the planet.
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Continental glaciations
General Landforms
North America
Canada United
Chippewa Moraine State Recreation Area , WisconsinCoteau des Prairies , South DakotaDevil's Lake State Park , WisconsinGlacial Lake Wisconsin , WisconsinGlacial Lakes State Park , MinnesotaHoricon Marsh State Wildlife Area , WisconsinIce Age Floods National Geologic Trail , Idaho, Oregon & WashingtonIce Age National Scientific Reserve , WisconsinIce Age Trail , WisconsinInterstate State Park , Minnesota & WisconsinKelleys Island , OhioKettle Moraine State Forest , WisconsinLake Bonneville , UtahLake Lahontan , NevadaLake Missoula , MontanaMill Bluff State Park , WisconsinOneida Lake , New YorkTwo Creeks Buried Forest State Natural Area , WisconsinWithrow Moraine and Jameson Lake Drumlin Field , WashingtonYosemite National Park , California
Eurasia and Time periods
Subcategories
This category has the following 3 subcategories, out of 3 total.
Pages in category "Ice ages"
The following 4 pages are in this category, out of 4 total.
