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New Geology Paper on the route of the ancient Colorado River

Brennan O’Connell, Rebecca Dorsey, and Eugene Humphreys recently published a paper in Geology in which they describe tidal sedimentary facies and layered rhythmites that provide evidence for a more northerly extent of the Gulf of California during Pliocene time. This result suggests that uplift over the last five million years has changed the area from a marine embayment to an elevated desert landscape, contradicting earlier hypotheses that the sediments accumulated in a series of freshwater to saline lakes.

Here is an Around the O piece on the study:

http://around.uoregon.edu/content/signs-ocean-tides-may-change-view-early-colorado-river

Here is the original study:

http://geology.gsapubs.org/content/early/2016/12/08/G38608.1.abstract?papetoc



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