Not all canyons are created equal. Steep canyons with amphitheatre-shaped heads are thought to result from the activity of groundwater, on the basis of studies of such features that developed in ...
Some of the largest floods in earth history drained through the Columbia River during Pleistocene glacial periods (Baker, 2009). These events are known as the Missoula Floods or the Scabland Floods.
A new study provides compelling new evidence that a colossal 'megaflood' refilled the Mediterranean Sea, ending a period during which the Med was a vast expanse of salt flats. The study suggests the ...
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