Rocky Mountain foreland uplifts: Products of a rotating stress field or strain partitioning?

Research Article| December 01, 1993 Rocky Mountain foreland uplifts: Products of a rotating stress field or strain partitioning? Robert J. Varga Robert J. Varga 1Department of Geology, College of Wooster, Wooster,Ohio 44691 Search for other works by this author on: GSW Google Scholar Author and Article Information Robert J. Varga 1Department of Geology, College of Wooster, Wooster,Ohio 44691 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (12): 1115–1118. https://doi.org/10.1130/0091-7613(1993)021<1115:RMFUPO>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Robert J. Varga; Rocky Mountain foreland uplifts: Products of a rotating stress field or strain partitioning?. Geology 1993;; 21 (12): 1115–1118. doi: https://doi.org/10.1130/0091-7613(1993)021<1115:RMFUPO>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Stress-tensor analysis of minor faults near the structural range fronts of diversely oriented Laramide foreland uplifts in the central Rocky Mountains, Wyoming, indicates that paleo-σ1 was horizontal and oriented nearly perpendicular to uplift trends. Trend directions for σ1 vary from east-northeast in the north-trending Laramie Range, to northeast in the northwest-trending Bighorn Mountains, to north at east-trending Casper Mountain and in the east-trending central Owl Creek Mountains. Although these compression directions are compatible with models invoking temporally changing stress directions during the Laramide orogeny, the apparent similarity in timing of uplift in these ranges suggests that the computed stress tensors may not reflect regional stress conditions. Recent stress determinations in transpressional regimes suggest that strain partitioning may be an important factor in considering local stress patterns in the vicinity of mountain belt structures oblique to regional trends. In light of these studies, caution should be used in interpreting regional paleostress from structures measured close to the tectonic fronts of Laramide uplifts. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.