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NASA base image shows eastern Washington's Channeled Scabland from space. Major scabland tracts are identified: Moses Coulee (1), Grand Coulee (2), Telford-Crab Creek (3) and Cheney-Palouse (4). Another ice sheet (Laurentide) east of the Rocky Mountains - extended south to about same latitude as the Cordilleran sheet. Illustration does not show alpine glaciers that were feeding down into ice sheet from the mountain ranges.