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The melting ice formed the Great Lakes, the Upper Peninsula and Lower Peninsula (in the Michigan Basin). 12800 BC Mastodons and other ice age mammals started to appear in the fossil record. 11000 BC to 9000 BC Archeological evidence of Paleo-Indians appeared, in the form of sharpened stone tool points known as fluted biface .
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Declining ice cover and increasingly severe storms would harm both types of fish habitat through erosion and flooding. Warming could also harm ecosystems by changing the timing of natural processes such as migration, reproduction, and flower blooming". [6] "Migratory birds are arriving in the Midwest earlier in spring today than 40 years ago.
Severe winter storms also were associated with the bitter cold, which allowed for heavy snowfall and ice accumulations to places as far south as Houston, Texas, and contributing to one of the snowiest winters ever in some areas in the Deep South. With the record cold advancing so far south, effects were crippling and widespread.
A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods. The Last Glacial Period ended about 15,000 years ago. [1]
Severe cold still covered areas from the Northeast and Midwest. Schools began to close because of the extreme cold. Homeless people had a hard time finding shelter, causing some deaths. Snow and blowing wind created dangerous wind chills. Due to blowing snow, ice, and severe cold, semi trucks had their deliveries delayed.
The February 2015 North American cold wave was an extreme weather event that affected most of Canada and the eastern half of the United States. Following an earlier cold wave in the winter, the period of below-average temperatures contributed to an already unusually cold winter for the Eastern U.S.
The 1994 North American cold wave occurred over the midwestern and eastern regions of the United States and southern Canada in January 1994. The cold wave caused over 100 deaths in the United States. Two notable cold air events took place from January 18–19 and January 21–22. There were 67 minimum temperature records set on January 19. [1]