Minerals Yearbook PDF Download
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Author:
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Category : Mineral industries
Languages : en
Pages : 632
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Category : Historic buildings
Languages : en
Pages : 126
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Author:
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Category : Mineral industries
Languages : en
Pages : 632
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Category : National parks and reserves
Languages : en
Pages : 230
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Author: Ohio Co-operative Topographic Survey
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Category : Michigan
Languages : en
Pages : 782
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Author:
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Category : Michigan
Languages : en
Pages : 788
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Author: Paul Inkenbrandt
Publisher: Utah Geological Survey
ISBN: 1557918910
Category : Base flow (Hydrology).
Languages : en
Pages : 122
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Book Description
This 116-page report presents the results of an investigation by the Utah Geological Survey of land subsidence and earth fissures in Cedar Valley, Iron County, Utah. Basin-fill sediments of the Cedar Valley Aquifer contain a high percentage of fine-grained material susceptible to compaction upon dewatering. Groundwater discharge in excess of recharge (groundwater mining) has lowered the potentiometric surface in Cedar Valley as much as 114 feet since 1939. Groundwater mining has caused permanent compaction of fine-grained sediments of the Cedar Valley aquifer, which has caused the land surface to subside, and a minimum of 8.3 miles of earth fissures to form. Recently acquired interferometric synthetic aperture radar imagery shows that land subsidence has affected approximately 100 mi² in Cedar Valley, but a lack of accurate historical benchmark elevation data over much of the valley prevents its detailed quantification. Continued groundwater mining and resultant subsidence will likely cause existing fissures to lengthen and new fissures to form which may eventually impact developed areas in Cedar Valley. This report also includes possible aquifer management options to help mitigate subsidence and fissure formation, and recommended guidelines for conducting subsidence-related hazard investigations prior to development.
Author: Timothy W. Canaday
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Category : Archaeological surveying
Languages : en
Pages : 228
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Category : Stone
Languages : en
Pages : 646
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Author: United States. Bureau of Mines
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Category : Digital images
Languages : en
Pages : 884
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Author:
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Category : Geology
Languages : en
Pages : 1190
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