CHICAGO — As an ice sheet thousands of feet thick began its final crawling retreat from North America to the Arctic toward the end of the last glacial period some 10,000 years ago, it left behind the ...
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300 million-year-old hotspot linked to the formation of the Great Lakes discovered by scientists; where is it now?
The discovery of the fact that the Great Lakes originate from a geological hotspot beneath the ancient supercontinent Pangaea presents a major advancement in the comprehension of the geological ...
Yes. Though, it is rare for the entire lake system to freeze over, ice coverage can still reach 90% or more. According to GLERL's records, two lakes have frozen over completely: Lake Superior in 1973 ...
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