A TV program mentioned an area that looks like a great water
fall but wtih no water.
Scientists thought the area was carved by errosion, but another researcher postulated a glacer melt caused the feathures
2007-11-09 08:56:28 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Howard H has it right. About a year ago there was a fantastic NOVA episode on the Missoula floods. These occurred towards the end of the last ice age when the ice sheet blocked off the Clark Fork river in northern Idaho. The lake behind the ice grew several thousand feet deep and contained more water than Lakes Eire and Ontario combined. Eventually, the ice floated, the ice damn broke and all that water rushed across central Washington and through the Columbia River Gorge into the Pacific Ocean.
The remarkable thing is that this happened about 45 times over a roughly 2,000 year period.
2007-11-09 09:56:24 · answer #1 · answered by Flyboy 6 · 1⤊ 0⤋
Dry Falls, near Coulee City in Eastern Washington. It was eroded, but in great floods from glacial Lake Missoula. Catastrophic floods would flow as far as the Pacific Ocean. Find info on-line, and if possible take the driving tour or at least visit Dry Falls. Spectacular!
2007-11-09 17:50:30 · answer #2 · answered by Howard H 7 · 2⤊ 0⤋
The channeled scablands. Carved from multiple catastrophic releases of glacial lake water according to the current theory. There was a show on NOVA about this last year or so.
2007-11-09 19:34:04 · answer #3 · answered by busterwasmycat 7 · 0⤊ 0⤋