Abstract
Introduction
Purpose of investigation
Location of area
Methods of investigation
Surface features
Climate
Acknowledgments
Well-numbering systems
Reporting of water-quality data
Geologic units and events and the water-bearing characteristics of the rocks
Perspective
Bedrock
Unconformity at the base of the fanglomerate
The fanglomerate
Lithology and thickness
Conditions of deposition
Age
Water-bearing characteristics
Unconformity between the fanglomerate and the Bouse Formation
Bouse Formation
Definition
Distribution and thickness
Lithology
Basal limestone
Interbedded unit
Tufa
Paleontology
Age
Water-bearing characteristics
Post-Bouse degradation and aggradation by the Colorado River
Alluviums of the Colorado River and its tributaries
Older alluviums
Unit A
Unit B
Definition
Distribution
Lithology and thickness
Piedmont gravels (unit C)
Unit D
Unit E
Eolian sand deposits
Younger alluvium
Lithology and thickness
Age of the Colorado River alluvium
Section at Parker Dam
The Chemehuevi Formation
Water-bearing characteristics
Paleohydrology of the lower Colorado River
Geologic controls on the lower Colorado River
Features of the Colorado River prior to development
Valley slope during deposition of the several Colorado River deposits
Degradations and aggradations of the Colorado River
Drainage from Death Valley region to the Colorado River
Structure of sediments
Ground-water resources of the Parker-Blythe-Cibola area
Occurrence of ground water
Recharge
Underflow beneath Tyson Wash
Underflow to Palo Verde Mesa from Chuckwalla Valley
Underflow from Milpitas Wash area
Discharge
Parker Valley
Ground water under natural conditions
Magnitude of ground-water movement
Transmissivities
Historical development of irrigation
Ground water in recent years
Magnitude of ground-water movement
Ground water in future years
Water-level fluctuations
Depth to ground water
Palo Verde and Cibola Valleys
Ground water under natural conditions
Historical development of irrigation
Ground water in recent years
Ground water in future years
Water-level fluctuations
Depth to ground water
Water budgets
Streamflow depletion
Unmeasured runoff
Ground-water inflow
Ground-water outflow
Consumptive use by natural vegetation
Consumptive use by crops
Changes in ground-water storage
Evaporation from water surfaces
Parker Valley, and Palo Verde and Cibola Valleys
Pumping tests
Comments on tests for which reliability of transmissivity is classified as poor
Evaluation of pumping tests
Ground-water storage
Quality of water
Sources of information
Presentation of data
Chemical character of the Colorado River water
Relation of water quality to geology and hydrology
The shallow zone underlying the flood plain
The principal gravel zone underlying the flood plain
The deep zone underlying the flood plain
The piedmont areas
Parker Mesa
Ehrenberg slope
Vidal Valley
Palo Verde Mesa
Outlying uplands
Chemical changes in ground water
Potential for development of ground water
Parker Valley
Palo Verde Valley
Cibola Valley
Vidal area
Big Maria-Riverside area
Palo Verde Mesa area
Mule area
Milpitas area
Parker Mesa are a
La Posa area
Tyson area
Ehrenberg area
References cited
Selected logs of wells
Index.