Image credit: Wikipedia commons. As Sheep Mountain is a topographic high and barrier to streamflow, how was the river able to establish itself and eventually erode through the anticline? It is 15 miles long and the involved rock formations, which were originally horizontal, have been bent and uplifted over 1000 feet. Observations of shearing also constrain spatial and temporal variations of the stress state across the anticline during folding. Bergbauer , S. & Pollard , D. D. 2004 . environmental, geology, landscape Galleries Competitions Tags Sheep Mountain Anticline, Sheep Mountain, wyoming, Laramide Orogeny, m.a.g.i.c., geology, anticline, permian, hogbacks Description 44*34'35" N 108*4'36" W - Facing Southwest. 0000008787 00000 n Sheep Mountain Anticline, located on the eastern edge of the Bighorn Basin, Wyoming, is a well known NW–SE trending, asymmetric Laramide fold ().The Laramide orogeny was characterized by a NE–SW compression (Engebretson et al., 1985, Bird, 2002).The Bighorn River cuts the anticline normal to the fold axis, providing exposure of rock strata in the fold core. x�b```"ѷ� �a�sddZ���z�� Y& � �Xd�c����w�'��.�|`�� The lower unit of the Gypsum Spring Formation is interbedded shale and gypsum. Photo by Bernhard Edmaier #patterns #geology Methods of Study Field observations for this study were begun in June 1976 and were completed by the end of August that same year. School Begins! Stitcher Notes Toggle Minimize. Mechanisms for Deformation of Sedimentary Strata at Sheep Mountain Anticline, Bighorn Basin, Wyoming . 0000001759 00000 n 2004. Recent field studies at Sheep Mountain Anticline, a Laramide fold on the eastern flank of the Bighorn Basin in Wyoming, constrain the fold kinematics using the fracture pattern mapped across the fold. Sheep Mountain is a textbook example of an anticline fold. The Ancestral Bighorn River established a course over the landscape while the anticline was still buried at depth. The eventual goal is complete geologic map coverage of Sheep Mountain Anticline. Near Greybull, Wyoming is a long ridge called Sheep Mountain. Photo taken on May 28, 2013. Day 2: Sheep Mountain June 29, 2009 6/23/09 “And be on guard, I saw five or six rattlesnakes last time I was here.” Chris and Eric at the anticline. Map 1: This structure is the Sheep Mountain anticline in Wyoming. Sheep Mountain Anticline, located on the eastern edge of the Bighorn Basin, Wyoming, is a well known NW–SE trending, asymmetric Laramide fold (Fig. _GeologyLinks | Geography | Geology | Landforms |, Interact: var addthis_pub="usra";Share | Discuss on Facebook | Subscribe,