Ancient Colorado River mystery solved: Ancient shallow sea
with strong tides. University of Oregon. December 17, 2020
[www.sciencedaily.com]

The papers are:

Dorsey, R.J., O'Connell, B., McDougall, K. and Homan, M.B.,
2018. Punctuated sediment discharge during early Pliocene
birth of the Colorado River: Evidence from regional stratigraphy,
sedimentology, and paleontology. Sedimentary Geology, 363,
pp.1-33.
[eartharxiv.org]
[www.researchgate.net]
[www.researchgate.net]

Kevin Gardner, Rebecca J. Dorsey. Mixed carbonate-siliciclastic
sedimentation at the margin of a late Miocene tidal strait, lower
Colorado River Valley, southwestern USA. Sedimentology, 2020.

Brennan O'Connell, Rebecca J. Dorsey, Stephen T. Hasiotis,
Ashleigh v.s. Hood. Mixed carbonate-siliciclastic tidal
sedimentation in the Miocene to Pliocene Bouse Formation,
palaeo-Gulf of California. Sedimentology, 2020.
[eartharxiv.org]

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)