Lake Great Falls

From Wikipedia, the free encyclopedia

Map of Montana showing Glacial Lake Great Falls.

Lake Great Falls was a prehistoric proglacial lake which existed in what is now central Montana in the United States between 15,000 BCE and 11,000 BCE. [1] [2] [3] Centered on the modern city of Great Falls, Montana, Glacial Lake Great Falls extended as far north as Cut Bank, Montana, and as far south as Holter Lake. [4] At present-day Great Falls, the Glacial Lake Great Falls reached a depth of 600 feet (183 metres). [5]

Approximately 1.5 million years ago, the Missouri River, the Yellowstone River and Musselshell River all flowed northward into a terminal lake. [6] [7] During the last glacial period, the Laurentide and Cordilleran ice sheets pushed these lakes and rivers southward. [1] [6] Between 15,000 BCE and 11,000 BCE, the Laurentide ice sheet blocked the Missouri River and created Glacial Lake Great Falls. [1] [2] [3]

About 13,000 BCE, as the glacier retreated, Glacial Lake Great Falls emptied catastrophically in a glacial lake outburst flood. [3] The meltwater poured through the Highwood Mountains and eroded the hundred mile-long, 500-foot-deep (150 m) Shonkin Sag—one of the most famous prehistoric meltwater channels in the world. [8]


LAKE GREAT FALLS INFORMATION

Lake ... Great ... Falls ...

POPULAR VIDEOS AND PHOTOS



POPULAR ONLINE SOURCES

Google | Yahoo | Bing | DuckDuckGo | Ask | Aol | Facebook | Twitter | Linkedin | The New York Times | Yelp | Buzzfeed | US Weekly | RollingStone | WebMD | The Verge | HubPages | PlayBuzz | ESPN



  ↑ TOP OF PAGE ↑  


© Computer Services Express