The Channeled Scablands Of Eas


tern Washington
As we enter Washington from the east, we immediately run into the gentle rolling hills of the Palouse country. If we continue to travel westward, we suddenly enter a heavily scarred land of barren rock, channels and canyons. Rugged cliffs, basalt rock basins, concave cliffs and even giant ripple marks line the landscape. We have just reached the edges of tern Washington. The bleak but intensely unique landscape causes us to ponder the origin of the land formations. "What could have happened here?" The answer is the largest, most violent floods that man has ever known.
Geologist J. Harlen Bretz of the University of Chicago first named the Channeled Scablands in 1920. He ...

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surrounded by mountains and encircled by three rivers. As the molten rock cooled it began to crack and form hexagonal patterns through out it. These joints broke up the lava in vertical columns of basalt rock. After eruptions as a whole stopped, the lava field was tilted as a unit to the southwest. Today the northeast rim is 2,300 feet taller then the southwest, creating a natural flood plan to the Columbia River. Beginning a while after the lava cooled, windblown silt, or loess, began to accumulate over the field, eventually producing the rich farmland of the Palouse hills. The silt reaches a maximum depth in the Pullman-Colfax area at 200 feet.
The Northern Hemisphere's Ice Age began more then 2 million years ago, but the Scablands history was not yet formed until 100,000 years ago. At this time the great continental glaciers began to make their march from British Columbia to what is now known as northern Washington, Idaho, and Montana. The ice sheet divided its ...

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PAPER DETAILS
Added: 1/4/2004 04:12:39 AM
Category: Miscellaneous
Words: 1010
Pages: 4

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