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dc.contributor.authorSlaff, S.
dc.contributor.authorJackson, G.W.
dc.contributor.authorPearthree, P.A.
dc.date.accessioned2018-11-10T02:54:29Z
dc.date.available2018-11-10T02:54:29Z
dc.date.issued1989-12-01
dc.identifier.citationSlaff, S., Jackson, G.W. and Pearthree, P.A., 1989, Development of earth fissures in Picacho Basin, Pinal County, Arizona from 1959-1989. Arizona Geological Survey Open File Report, OFR-89-10, 6 map sheet, map scale 1:24,000, 38 p.
dc.identifier.urihttp://hdl.handle.net/10150/630808
dc.descriptionEarth fissures are open surficial tension cracks in unconsolidated and semi-consolidated sediments that may display vertical and/or horizontal displacement. Earth fissures have become increasingly common in the sediment-filled basins of southern Arizona where ground water is being removed at high rates. Water-table altitude decline resulting from withdrawal of large quantities of ground water causes compaction of aquifer sediments, and aquifer compaction leads to land-surface subsidence. Differential subsidence produces stresses in sediments, and fissures develop where horizontal stresses are relatively large (Strange, 1983). Earth fissures have damaged a variety of facilities in southern Arizona during the past 60 years. The formation of fissures is one of several geologic hazards that must be recognized, understood, and overcome in order to construct and maintain reliable roads, buildings, utility systems, and other structures. Under contract to the U.S. Bureau of Reclamation (USBR), the Arizona Geological Survey (AZGS) conducted an evaluation of earth-fissure development in a portion of Picacho basin (also called Eloy basin or the lower Santa Cruz River basin) in order to determine development patterns and rates. The locations of Picacho basin and the portion of the basin studied are shown in Figure 1. (38 pages)
dc.language.isoen
dc.publisherArizona Geological Survey (Tucson, AZ)
dc.relation.ispartofseriesOFR-89-10
dc.relation.urlhttp://repository.azgs.az.gov/uri_gin/azgs/dlio/322
dc.rightsArizona Geological Survey. All rights reserved.
dc.subjectArizona Geological Survey Open File Reports
dc.subjectPicacho Basin
dc.subjectPinal County
dc.subjectArizona
dc.subjectsediment
dc.subjectgeologic hazards
dc.subjectsubsidence
dc.subjectgroundwater
dc.subjectearth fissures
dc.subjectGeology
dc.subjectRecent
dc.titleDevelopment of earth fissures in Picacho Basin, Pinal County, Arizona from 1959-1989
csdgm.bounding.west-112.126
csdgm.bounding.east-111.083
csdgm.bounding.north33.1651
csdgm.bounding.south32.3985
dc.description.collectioninformationDocuments in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu.
refterms.dateFOA2018-11-10T02:54:29Z


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