scholarly journals Redefining the age of the lower Colorado River, southwestern United States: COMMENT

Geology ◽  
2021 ◽  
Vol 49 (9) ◽  
pp. e531-e531
Author(s):  
Rebecca J. Dorsey ◽  
Gary J. Axen ◽  
Martin J. Grove ◽  
Bernard A. Housen ◽  
George Jefferson ◽  
...  
Keyword(s):  
United States ◽  
Colorado River ◽  
Southwestern United States ◽  
Lower Colorado River

scholarly journals Supplemental Material: Redefining the age of the lower Colorado River, southwestern United States

2021 ◽  
Author(s):  
Ryan Crow ◽  
et al.
Keyword(s):  
United States ◽  
Colorado River ◽  
Southwestern United States ◽  
Analytical Results ◽  
Lower Colorado River

Additional details on methods, summary of previous Ar/Ar dating relevant to the timing of Colorado River integration, sample locations, and full analytical results.<br>

scholarly journals Processed 1938 aerial photography for selected areas of the lower Colorado River, southwestern United States

2006 ◽  
Author(s):  
Laura M. Norman ◽  
Michael Gishey ◽  
Leila Gass ◽  
Brian Yanites ◽  
Edwin Pfeifer ◽  
...  
Keyword(s):  
United States ◽  
Aerial Photography ◽  
Colorado River ◽  
Southwestern United States ◽  
Lower Colorado River

scholarly journals Supplemental Material: Redefining the age of the lower Colorado River, southwestern United States

2021 ◽  
Author(s):  
Ryan Crow ◽  
et al.
Keyword(s):  
United States ◽  
Colorado River ◽  
Southwestern United States ◽  
Analytical Results ◽  
Lower Colorado River

Additional details on methods, summary of previous Ar/Ar dating relevant to the timing of Colorado River integration, sample locations, and full analytical results.<br>

scholarly journals Redefining the age of the lower Colorado River, southwestern United States: REPLY

Geology ◽  
2021 ◽  
Vol 49 (9) ◽  
pp. e532-e533
Author(s):  
R.S. Crow ◽  
J. Schwing ◽  
K.E. Karlstrom ◽  
M. Heizler ◽  
P.A. Pearthree ◽  
...  
Keyword(s):  
United States ◽  
Colorado River ◽  
Southwestern United States ◽  
Lower Colorado River

Redefining the age of the lower Colorado River, southwestern United States

Geology ◽  
2021 ◽  
Author(s):  
R.S. Crow ◽  
J. Schwing ◽  
K.E. Karlstrom ◽  
M. Heizler ◽  
P.A. Pearthree ◽  
...  
Keyword(s):  
United States ◽  
Gulf Of California ◽  
Colorado River ◽  
Grand Canyon ◽  
Plate Motion ◽  
Southwestern United States ◽  
Northern Mexico ◽  
Base Level ◽  
Salton Trough ◽  
Lower Colorado River

Sanidine dating and magnetostratigraphy constrain the timing of integration of the lower Colorado River (southwestern United States and northern Mexico) with the evolving Gulf of California. The Colorado River arrived at Cottonwood Valley (Nevada and Arizona) after 5.24 Ma (during or after the Thvera subchron). The river reached the proto–Gulf of California once between 4.80 and 4.63 Ma (during the C3n.2r subchron), not at 5.3 Ma and 5.0 Ma as previously proposed. Duplication of section across newly identified strands of the Earthquake Valley fault zone (California) probably explains the discrepancy. The data also imply the start of focused plate motion and basin development in the Salton Trough (California) at 6–6.5 Ma and relative tectonic stability of the southernmost part of the lower Colorado River corridor after its integration. After integration, the Colorado River quickly incised through sediment-filled basins and divides between them as it also likely excavated Grand Canyon (Arizona). The liberated sediment from throughout the system led to deposition of hundreds of meters of Bullhead Alluvium downstream of Grand Canyon after 4.6 Ma as the river adjusted to its lower base level.

Reconciling Environmental and Flood Control Goals on an Arid-Zone River: Case Study of the Limitrophe Region of the Lower Colorado River in the United States and Mexico

2008 ◽  
Vol 41 (3) ◽  
pp. 322-335 ◽  
Author(s):  
Edward P. Glenn ◽  
Kate Hucklebridge ◽  
Osvel Hinojosa-Huerta ◽  
Pamela L. Nagler ◽  
Jennifer Pitt
Keyword(s):  
United States ◽  
Flood Control ◽  
Colorado River ◽  
Arid Zone ◽  
The United States ◽  
Lower Colorado River

Historical Changes in Large River Fish Assemblages of the Americas

2005 ◽  
Keyword(s):  
United States ◽  
Colorado River ◽  
Fish Assemblages ◽  
Habitat Degradation ◽  
Fish Fauna ◽  
Physical Habitat ◽  
Introduced Fish ◽  
Regulated Rivers ◽  
The World ◽  
Lower Colorado River

<em>Abstract.</em>—The lower Colorado is among the most regulated rivers in the world. It ranks as the fifth largest river in volume in the coterminous United States, but its flow is fully allocated and no longer reaches the sea. Lower basin reservoirs flood nearly one third of the river channel and store 2 years of annual flow. Diverted water irrigates 1.5 million ha of cropland and provides water for industry and domestic use by 22 million people in the southwestern United States and northern Mexico. The native fish community of the lower Colorado River was among the most unique in the world, and the main stem was home to nine freshwater species, all of which were endemic to the basin. Today, five are extirpated, seven are federally endangered, and three are being reintroduced through stocking. Decline of the native fauna is attributed to predation by nonnative fishes and physical habitat degradation. Nearly 80 alien species have been introduced, and more than 20 now are common. These nonnative species thrived in modified habitats, where they largely eliminated the native kinds. As a result, the lower Colorado River has the dubious distinction of being among the few major rivers of the world with an entirely introduced fish fauna.

scholarly journals Point sources of emerging contaminants along the Colorado River Basin: Source water for the arid Southwestern United States

2012 ◽  
Vol 430 ◽  
pp. 237-245 ◽  
Author(s):  
Tammy L. Jones-Lepp ◽  
Charles Sanchez ◽  
David A. Alvarez ◽  
Doyle C. Wilson ◽  
Randi-Laurant Taniguchi-Fu
Keyword(s):  
United States ◽  
River Basin ◽  
Emerging Contaminants ◽  
Colorado River ◽  
Point Sources ◽  
Colorado River Basin ◽  
Source Water ◽  
Southwestern United States
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