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Lecture

Significance of Paleofloods.docx

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Department
Geology
Course
GEOL 2207
Professor
B.Ward
Semester
Summer

Description
Significance of Paleofloods: Glacial Lake Missoula  Glacial Lake Missoula (~2000km^3) dammed by Cordilleran ice sheet 13-15 ka BP  Repeated floods created channeled scablands of eastern Washington o Large glacier came from Canada, blocked River  Formed glacial lake, eventually got big enough that destroyed the dam  Water rapidly flooded out Significance of Paleofloods: Glacial Lake Agassiz  182 years ago  Coming out of last glaciation  Big chunks of ice left over, not melted yet  Large ice sheet blocked drainage of Hudson Bay  Suddenly, Lake Agassiz drained into Hudson Bay and went into Labrador Sea
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