Revisions to Stratigraphic Nomenclature of Jurassic and Cretaceous Rocks of the Colorado Plateau PDF Download
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Author: Steven M. Condon
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 69
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Book Description
Author: Steven M. Condon
Publisher:
ISBN:
Category : Geology, Stratigraphic
Languages : en
Pages : 69
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Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 80
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Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 76
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Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 746
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Book Description
Author: Kenneth L. Tanaka
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 494
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Book Description
A workshop report on the rationale for airborne remote sensing in earth science in the next decade.
Author:
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ISBN:
Category : Hydrology
Languages : en
Pages : 48
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Book Description
Author: Joe A. Baldwin
Publisher:
ISBN:
Category : Aquifers
Languages : en
Pages : 116
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Book Description
Author: Steven D. Craigg
Publisher: U.S. Government Printing Office
ISBN:
Category : Science
Languages : en
Pages : 84
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Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 170
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Book Description
Author: Blakemore E. Thomas
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 54
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Book Description
The N aquifer is the major source of water in the 5,400-square-mile area of Black Mesa in northeastern Arizona. Availability of water is an important issue in this area because of continued industrial and municipal use, a growing population, and a precipitation of only about 6 to 12 inches per year. The monitoring program in Black Mesa has been operating since 1971 and is designed to determine the long-term effects of ground-water withdrawals from the N aquifer for industrial and municipal uses. The monitoring program includes measurements of (1) ground-water pumping, (2) ground-water levels, (3) spring discharge, (4) surface-water discharge, and (5) ground-water chemistry. In 1999, total ground-water withdrawals were 7,110 acre-feet, industrial use was 4,210 acre-feet, and municipal use was 2,900 acre-feet. From 1998 to 1999, total withdrawals increased by 0.7 percent, industrial use increased by 4 percent, and municipal use decreased by 4 percent. From 1998 to 1999, water levels declined in 11 of 15 wells in the unconfined part of the aquifer, and the median decline was 0.7 foot. Water levels declined in 14 of 16 wells in the confined part of the aquifer, and the median decline was 1.2 feet. From the prestress period (prior to 1965) to 1999, the median water-level decline in 31 wells was 10.6 feet. Median water-level changes were 0.0 foot for 15 wells in the unconfined part of the aquifer and -45.5 feet in 16 wells in the confined part. From 1998 to 1999, discharges were measured annually at four springs.
