Upper Triassic and Lower Jurassic fluvial and eolian deposits, Zion National Park, Utah, U.S.A.
نویسندگان
چکیده
منابع مشابه
Cyclic Eolian Stratification on the Jurassic Navajo Sandstone, Zion National Park: Periodicities and Implications for Paleoclimate
Zion National Park and related areas of southern Utah contain exposures of the largest ancient wind-blown (eolian) dune system known in North America, preserved in the Jurassic Navajo Sandstone. Despite the common lack of absolute age constraints, ancient desert sand seas (ergs) and their erg margins can record valuable paleoclimatic proxies in the sedimentary record. The central erg portion of...
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We describe an isolated archosauriform tooth from the Upper Triassic Painted Desert Member of the Petrified Forest Formation in Zion National Park in southwestern Utah. This tooth is relatively low (mesiodistally as long as baso-apically tall), bulbous and asymmetrical in occlusal view, and has denticles that are oblique to the tooth crown. The base of the tooth is also slightly expanded relati...
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A partial skeleton of the aetosaur Stagonolepis sp. is the first tetrapod body fossil recovered from Upper Triassic strata in Canyonlands National Park. The specimen consists of a partial tooth and numerous disarticulated vertebrae, ribs, and scutes found in the Blue Mesa Member of the Petrified Forest Formation (Chinle Group) near Upheaval Dome. Stagonolepis is an index taxon of the Adamanian ...
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The Olang area is a part of Gheshlagh-Olang synclinal, which is a member of eastern Alborz coal basin and is situated at a distance of70 km northeast of Shahroud city. Coal-bearing strata of this region are part of the Shemshak group (Upper Triassic to Lower Jurassic).Samples from the 9 coal seams of the Olang coal deposits were collected and ashed. The aim of this study is to determine theoccu...
متن کاملTriassic-jurassic Boundary on the Southern Margin of Tethys: Implications of Facies, Tectonics and Volcanism
The facies changes, tectonics and magmatism across the Triassic–Jurassic boundary in the southern Tethyan margin have been studied in Egypt, Sudan, Jordan and Saudi Arabia. In Saudi Arabia and Jordan an unconformable contact is recognized between the Upper Triassic and Lower Jurassic rocks. This unconformity surface is marked by the truncation of the fluvial clastics of the uppermost Triassic b...
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ژورنال
عنوان ژورنال: Journal of the Sedimentological Society of Japan
سال: 2006
ISSN: 1882-9457,1342-310X
DOI: 10.4096/jssj.63.2