Late Cenozoic Drainage History of the Southwestern Great Basin and Lower Colorado River Region: Geologic and Biotic Perspectives

Late Pleistocene aggradation and degradation of the lower Colorado River: Perspectives from the Cottonwood area and other reconnaissance below Boulder Canyon
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Published:January 01, 2008
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CiteCitation
Scott C. Lundstrom, Shannon A. Mahan, James B. Paces, Mark R. Hudson, P. Kyle House, Daniel V. Malmon, J. Luke Blair, Keith A. Howard, 2008. "Late Pleistocene aggradation and degradation of the lower Colorado River: Perspectives from the Cottonwood area and other reconnaissance below Boulder Canyon", Late Cenozoic Drainage History of the Southwestern Great Basin and Lower Colorado River Region: Geologic and Biotic Perspectives, Marith C. Reheis, Robert Hershler, David M. Miller
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Where the lower Colorado River traverses the Basin and Range Province below the Grand Canyon, significant late Pleistocene aggradation and subsequent degradation of the river are indicated by luminescence, paleomagnetic, and U-series data and stratigraphy. Aggradational, finely bedded reddish mud, clay, and silt are underlain and overlain by cross-bedded to plane-bedded fine sand and silt. That sequence is commonly disconformably overlain by up to 15 m of coarse sand, rounded exotic gravel, and angular, locally derived gravel. Luminescence dates on the fine sediments range from ca. 40 ka to 70 ka, considering collective uncertainties. A section of fine-grained sediments over...
- absolute age
- actinides
- aggradation
- Arizona
- Basin and Range Province
- Cenozoic
- clastic sediments
- Colorado River
- dates
- drainage basins
- erosion
- geochronology
- geomorphology
- Grand Canyon
- isotopes
- Lake Mead
- landform evolution
- landforms
- lithostratigraphy
- luminescence
- metals
- Mohave County Arizona
- North America
- paleoclimatology
- paleomagnetism
- paleorelief
- Pleistocene
- Quaternary
- radioactive isotopes
- relative age
- sediments
- stratigraphic units
- Th-230
- Th/U
- thorium
- tributaries
- United States
- upper Pleistocene
- valleys
- Yuma County Arizona
- Las Vegas Wash
- Chemehuevi Formation
- Cottonwood Arizona