Most life was wiped out, and the creatures that did survive huddled in small pockets of open water, where hot springs continued to bubble up. This was Snowball Earth â a deep freeze that began around 715 million years ago and held Earth in its icy grip for a good 120 million years. There are no other comparable glacial periods on Earth.
Lake Barkley Lake Levels. The lake's level is fluctuated from summer to winter for flood control purposes. Summer pool (359 ft. sea level) is normally reached by May 1. The water level begins dropping gradually on July 1, and winter pool (354 ft.) is reached by December 1.
How deep is the lake of the Ozarks? When the Lake of the Ozarks water level is at it's top range, the lake can be as deep as about 105 feet. This depth can be found in the middle of the lake's main channel withi â¦ n 1 mile of Bagnell Dam. 12 people found this useful. Tricia Kilgour.