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More about the great divide basin: Yes, the Rock Springs uplift is responsible for the high that creates the modern continental divide between rock springs and rawlins wyoming. There is, however, some debate as to whether the uplift itself caused the location of the divide, or that the diversion of the Green River did. Some geologists have supposed that the Green River once flowed eastward into the north platte near rawlins, and that it was "captured" by another stream near green river, WY about 600,000 years ago. That event would have diverted the headwaters of the Green River into the Colorado river system rather than the Mississippi river system. Prior to this hypothesized "capture", the continental divide would have been the wyoming range on the Wyoming/Idaho border and the uinta range on the utah/wyoming border. All of wyoming would have drained east to the mississippi river. This hypothesis is championed by Wallace Hanson in various publications and Wilmot Bradley in 1936. There is another geolgist at the community college in rock springs who disagrees with this capture. He and some students have done some extensive mapping of the Green River near Green River, WY. kevin
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