Fissures
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The Origin and Extent of Earth Fissures in Escalante Valley, Southern Escalante Desert, Iron County, Utah
Author: William R. Lund
language: en
Publisher: Utah Geological Survey
Release Date: 2005-08
This CD contains a 30-page report and 37-photo appendix of an investigation by the Utah Geological Survey of five recently discovered earth fissures in southwestern Utah. The earth fissues, which likely resulted from aquifer compaction due to ground-water withdrawal, were revealed after floodwater infiltrated into and enlarged the fissures during January 2005. This study discusses the geology and hydrology of the Escalante Valley where the fissures formed, includes maps of the fissure traces, discusses the most probable cause of fissure formation, and presents recommendations for future study. 30 pages + 37 page appendix
Anal Fissure
This highly informative monograph offers a comprehensive and interdisciplinary reference guide for the management and treatment of the whole spectrum of painful tears in the anus and anal canal. Based upon a systematic review of all relevant papers on the topic since 1865, it addresses primary, acute and chronic anal fissures – providing a new definition of the last form – and secondary anal fissures in detail, particularly their medical history, etiology, signs and symptoms, medical findings, therapy and its evaluation, and differential diagnosis. The book also covers all available evidence-based therapeutic strategies. As such, it will appeal to a wide readership, from proctologists and surgeons to gynecologists, urologists, dermatologists and gastroenterologists.
Investigation of land subsidence and earth fissures in Cedar Valley, Iron County, Utah
Author: Paul Inkenbrandt
language: en
Publisher: Utah Geological Survey
Release Date: 2014-03-12
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.