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:
Here is the original study: