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dc.contributor.authorHarris, R.C.
dc.date.accessioned2018-09-29T02:14:32Z
dc.date.available2018-09-29T02:14:32Z
dc.date.issued2000-09-01
dc.identifier.citationHarris, R.C., 2000, Maps showing surface exposures of salty Lacustrine sediments in the Safford Basin, Graham County, Arizona. Arizona Geological Survey Open File Report, OFR-00-10, 20 p.
dc.identifier.urihttp://hdl.handle.net/10150/629816
dc.descriptionThe Safford basin is a deep, sediment-filled structural trough containing abundant lacustrine (lake) and playa sediments, reflecting long periods of closed-basin conditions. Gravity models indicate that the Safford basin is up to 12,000 feet deep (Oppenheimer and Sumner, 1980; 1981). Soluble minerals such as halite (salt), carbonates, gypsum, and anhydrite are common in the basin-fill sediments (Marlowe, 1961; Harbour, 1966; Harris, 1997, 1999). These minerals commonly form by evaporation of water and deposits formed in this way are called evaporites. In this report, the singular word 'salt' refers to halite, whereas the plural 'salts' refers to any soluble evaporite mineral. Typical Basin-and-Range basins were formed in the late Tertiary (12-6 million years, Ma), when high-angle normal faulting dropped central blocks between uplifted bounding blocks, forming a more or less symmetrical, deep structural basin. The Safford basin, however, was formed earlier than Basin and Range time by low-angle faulting resulting from crustal extension. Detachment faulting during the mid-Tertiary (30-20 Ma) extension formed the metamorphic core complex of the Pinaleiio Mountains and the tilted structural basin of the Safford Valley (Spencer and Reynolds, 1989; Kruger and others, 1995). Later Basin and Range faulting did not affect the Safford region to the extent that it did other areas of the southwest. ( 9 pages)
dc.language.isoen
dc.relation.ispartofseriesOFR-00-10
dc.relation.urlhttp://repository.azgs.az.gov/uri_gin/azgs/dlio/233
dc.rightsArizona Geological Survey. All rights reserved.
dc.subjectArizona Geological Survey Open File Reports
dc.subjectArizona
dc.subjectGraham County
dc.subjectSafford Basin
dc.subjectgeomorphology
dc.subjectGeology
dc.subjectevaporites
dc.subjectplaya sediments
dc.subjectlacustrine sediments
dc.subjectmaps
dc.subjectBasin and Range Province
dc.subjectstructural trough
dc.titleMaps showing surface exposures of salty Lacustrine sediments in the Safford Basin, Graham County, Arizona
csdgm.bounding.west-110.006
csdgm.bounding.east-109.039
csdgm.bounding.north33.0915
csdgm.bounding.south32.6394
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.dateFOA2018-09-29T02:14:32Z


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