 A butte in the Great Salt Lake Desert Lake Bonneville was a prehistoric pluvial lake that covered much of North America's Great Basin region. Most of the territory it covered was in present-day Utah, though parts of the lake extended into present-day Idaho and Nevada. Formed about 32,000 years ago, it existed until about 16,800 years ago, when most of the contents of the lake were released through the Red Rock Pass in Idaho. Many of the unique geological characteristics of the Great Basin are due to the effects of the lake. Photo taken by Daniel Mayer and released under terms of the GNU FDL. File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...
Photo taken by Daniel Mayer and released under terms of the GNU FDL. File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ...
A pluvial lake is a lake which experiences significant increase in depth and extent as a result of increased precipitation and reduced evaporation. ...
World map showing location of North America A satellite composite image of North America North America is a continent in the northern hemisphere, bounded on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the south by the Caribbean Sea, and on the west...
Map showing the Great Basin in orange The Great Basin is a large, arid region of the western United States, commonly defined as the contiguous watershed region, roughly between the Rocky Mountains and the Sierra Nevada, that has no natural outlet to the sea. ...
State nickname: Beehive State Other U.S. States Capital Salt Lake City Largest city Salt Lake City Governor Jon M. Huntsman, Jr. ...
State nickname: Gem State Other U.S. States Capital Boise Largest city Boise Governor Dirk Kempthorne (R) Official languages none Area 216,632 km² (14th) - Land 214,499 km² - Water 2,133 km² (0. ...
State nickname: Silver State, Battle Born State (official) Other U.S. States Capital Carson City Largest city Las Vegas Governor Kenny Guinn (R) Official languages None Area 286,367 km² (7th) - Land 284,396 km² - Water 1,971 km² (0. ...
Red Rock Pass is a mountain pass in Idaho that is famous for being the spot at which the ancient Lake Bonneville was emptied. ...
State nickname: Gem State Other U.S. States Capital Boise Largest city Boise Governor Dirk Kempthorne (R) Official languages none Area 216,632 km² (14th) - Land 214,499 km² - Water 2,133 km² (0. ...
The Great Salt Lake is a remnant of the original Lake Bonneville. Several levels of the old shorelines are still visible above Salt Lake City, along the Wasatch Front and elsewhere. Its appearance is that of a shelf or bench protruding from the mountainside, well above the valley floor. Four main shorelines are associated with the fluctuating levels of the ancient lake. The Stansbury, Bonneville, Provo and Gilbert shorelines each mark a time when lake level remained constant long enough to deposit massive accumulations of sand and gravel. Satellite Photo of the Great Salt Lake as it looked in 2003 Great Salt Lake is an endorheic saline lake in northern Utah, much saltier than the ocean. ...
The Salt Lake Temple of The Church of Jesus Christ of Latter-day Saints is Salt Lake Citys top tourist draw. ...
NASA-generated 3D composite photo of a portion of the Wasatch Front The Wasatch Front is the long, narrow metropolitan region of Utah, United States that extends roughly from Brigham City on the north to Santaquin on the south. ...
The Bonneville Bench, at approximately 1,555 m (~5,100 ft.) elevation, is part of the preserved ice age shoreline. This shoreline marks the highest level attained by the Pleistocene lake approximately 15,500 years ago. During this period, the lake covered over 52,000 km² (20,000 square miles ) and was over 300 m (1000 ft.) deep in places. Variations in CO2, temperature and dust from the Vostok ice core over the last 400 000 years For the animated movie, see Ice Age (movie). ...
The Pleistocene Epoch is part of the geologic timescale, usually dated as 1. ...
About 14,500 years ago, the lake level fell catastrophically as Lake Bonneville overflowed near Red Rock Pass, Idaho. The lake level fell some 105 m (~350 ft.) to what is now the next lower bench (the "Provo level") in a flood that geologists estimate to have lasted up to a year. The Provo level is the most easily recognized shoreline feature throughout the valley and is distinguished by thick accumulations of tufa that formed nearshore during the 500 years that the lake was at this level. Tufa is the name for an unusual geological formation. ...
About 14,000 years ago, the lake started to drop again due to changing climate conditions, and by 12,000 years ago, the lake reached a level even lower than that of the modern day Great Salt Lake. A slight transgression or rise in lake level occurred about 10,900 to 10,300 years ago and formed the Gilbert shoreline. The Gilbert shoreline is the least conspicuous of the major shorelines but evidence of it remains at Antelope Island and in large coastal features, such as the Fingerpoint Spit near the Hogup Mountains. Antelope Island State Park is part of the Utah State Parks System and is the largest of the Great Salt Lakes 10 islands. ...
See also This a partial list of prehistoric lakes. ...
Extent of prehistoric Lake Lahontan For the modern reservoir, see Lake Lahontan (reservoir) Ancient Lake Lahontan was an enormous endorheic lake that existed during the ice age, covering much of northwestern Nevada, extending into northeastern California and southern Oregon. ...
References - Green, S. A. and Currey, D. R. (1988). The Stansbury Shoreline and Other Transgressive Deposits of the Bonneville Lake Cycle. In In the Footsteps of G. K. Gilbert — Lake Bonneville and neotectonics of the Eastern Basin and Range Province. Guidebook for Field Trip Twelve, The Geological society of America, p. 55-57.
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