Figure 4. Stages in the evolution of the Songo River Valley. A. Sandy floodplain being built by the river as ice melts farther upstream. B. and C. Progressive stages of postglacial channel cutting. D. The ultimate stages of valley development with sweeping meanders, abandoned channels and all of the former plain removed. The present stage of evolution is intermediate between C. and D.

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Introduction   Geologic History   Features of Interest   Geologic Map (pdf)

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Last updated on September 6, 2006.

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