Photographer: Ryan Miller Summary Author: Ryan Miller The Sheep Mountain anticline, in the Bighorn Basin of Wyoming, formed during the Laramide orogeny. the backlimb of the anticline. There were two productive trends, the western trend aligned with the fault cutoff of the Paleozoic section and the second at the fault cutoff of the Jurassic Twin Creek. School has begun, which means that I will have less time to go to the field. The Mowry shale crops out in a SE-plunging syncline at the right. %PDF-1.4 %���� Geology Of the Bighorn Basin; 34th Annual Field Conference Guidebook, 1983 Pages 96-111. 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. 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. 0000002261 00000 n Jan 3, 2019 - 121 Likes, 4 Comments - Bernhard Edmaier (@bernhard_edmaier_photography) on Instagram: “Aerial view of the Sheep Mountain Anticline in Wyoming, USA. Name: _____ _ The image above features a slightly off-axis view of the NW-plunging nose of the Sheep Mountain anticline (44.642°N, 1 OB.186°W) in the Bighorn Basin of Wyoming (left side of image). Thus, I must pick the areas I will go for fracture analysis wisely. The white Muddy sand of the black Thermopolis shale appears at the center of view and bends around the nose of the anticline to extend along strike at the left. Field observations of sheared fractures and bedding planes in various structural locations across Sheep Mountain Anticline, Wyoming, document the role of fracture reactivation and flexural slip in folding related deformation. It is 15 miles long and the involved rock formations, which were originally horizontal, have been bent and uplifted over 1000 feet. We plan to reprocess ten 1980s vintage 2D seismic reflection profiles in the hopes of imaging the fault geometry beneath the anticline, focusing specifically on the abutting relationship between two oppositely dipping thrust faults. This analysis demonstrates that the growth of Sheep Mountain anticline induces a brutal release of 15Mpa of overpressure accumulated before folding during layer parallel shortening. The Sheep Mountain anticline, in the Bighorn Basin of Wyoming, formed during the Laramide orogeny. Typical anticline. It's where your interests connect you with your people. Abstract. 0000003215 00000 n It's where your interests connect you with your people. However, if a fold grows laterally along its axis, early-formed fold-related joints may differ significantly in orientation from joints that form later. May 1, 2019 - Aerial view of the Sheep Mountain Anticline in Wyoming, USA. Map 1: This structure is the Sheep Mountain anticline in Wyoming. Stanford Libraries' official online search tool for books, media, journals, databases, government documents and more. Stanford Libraries' official online search tool for books, media, journals, databases, government documents and more. 16. Shown above is a railroad cut that runs through this northwest-southeast trending anticline. The field data gathered then form the basis for a paper titled: "Geologic History of the Sheep Mountain Region". 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? @article{osti_6084236, title = {Surface and subsurface analysis of Sheep Mountain anticline, Wyoming}, author = {Abercrombie, S.}, abstractNote = {The Sheep Mountain area, in the southwest Wind River Basin, is the up plunge closure of the Derby Dome-Winkleman Dome producing trend of an echelon folds which comprise the first line of folding down the northeast flank of the Wind River Mountains. 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? This summer two of my sons and I took a hike through the Jurassic time period. Sheep Mountain Anticline is a basement cored, doubly-plunging, asymmetric fold on the east limb of the Bighorn structural basin. @article{osti_6084236, title = {Surface and subsurface analysis of Sheep Mountain anticline, Wyoming}, author = {Abercrombie, S.}, abstractNote = {The Sheep Mountain area, in the southwest Wind River Basin, is the up plunge closure of the Derby Dome-Winkleman Dome producing trend of an echelon folds which comprise the first line of folding down the northeast flank of the Wind River Mountains. Typical anticline. The Sheep Mountain Anticline is a fold generated during the Laramide mountain building event from 70 to 50 million years ago. x�b```"ѷ� �a�sddZ���z�� Y& � �Xd�c����w�'��.�|`�� Little Sheep Mountain Anticline - Fracture Analysis Graduate thesis research pertaining to fracture analysis of the Little Sheep Mountain Anticline. This summer two of my sons and I took a hike through the Jurassic time period. Geology of Sheep Canyon Quadrangle: Wyoming is the second such detailed investigation by graduate students at Iowa State University. %%EOF 234 CONTRIBUTIONS TO ECONOMIC GEOLOGY, 1916, PART II. Sheep Mountain Anticline, Wyoming Coordinates. 0000005465 00000 n 0000003139 00000 n Fold geometry at Sheep Mountain anticline, Wyoming, constructed using airborne laser swath mapping data, outcrop-scale geologic mapping, and numerical interpolation JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH Lovely, P., Zahasky, C., Pollard, D. D. 2010; 115 https://epod.usra.edu/blog/2014/03/sheep-mountain-anticline.html by impervious shale and within reach of the drill in folds favorable for the accumulation of oil and gas. Interaction among faults and influence on folding . Sheep Mountain Anticline conflict with one another. 2004. basement-cored, fault-related fold: Sheep Mountain Anticline, Wyoming, United States Nicolas Beaudoin, Nicolas Bellahsen, Olivier Lacombe, Laurent Emmanuel To cite this version: Nicolas Beaudoin, Nicolas Bellahsen, Olivier Lacombe, Laurent Emmanuel. The Bighorn River has carved a canyon through the structure perpendicular to the fold axis. Observations of shearing also constrain spatial and temporal variations of the stress state across the anticline during folding. _GeologyLinks | Geography | Geology | Landforms |, Interact: var addthis_pub="usra";Share | Discuss on Facebook | Subscribe,