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Sinbad Formation
The Sinbad Formation is a geologic formation in Utah initially named and described by James Gilluly and J.B. Reeside Junior in the 1920s. It is known for preserving fossils dating back to the Early Triassic Period. The Sinbad Limestone Member is a portion of the greater Moenkopi formation, and is made up of beds of yellowish-gray limestone, dolomite, quartz sandstone, siltstone and, conglomerate rock.〔〔 These beds range in thickness from 10 to 103 feet and hold fossils of Meekoceras fauna from the lower Triassic stage of history.〔 The area was once covered in shallow seawater that deposited sediment and marine life that would later comprise the sandstone formation.
The Sinbad Limestone Member is one of four in the San Rafael Swell including also the Black Dragon Member, Torrey Member and Moody Canyon Member.
The Sinbad Limestone Formation has been researched and characterized by scientists since its initial discovery in 1928.〔〔〔〔 In addition to research performed on the formation's geology and fossil stores scientists have also prospected the area for oil and other valuable natural resources.〔〔〔 Although the formation appears to have characteristics of an oil reserve the Sinbad Limestone Formation has not undergone significant drilling.〔〔
==Geography==
The Sinbad limestone is found in two locations near the junction of the Green and Colorado Rivers. It is found within the Moenkopi formations in the San Rafael Swell, Capital Reef, and the northern part of Circle Cliffs.〔Landis, E. R. Geological Survey Bulletin, Issue 1046. Washington DC: U.S. Department of the Interior, Geological Survey, 1949. p. 498.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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