Portal de Periódicos da CAPES

Large-scale recumbent folding in the Valley and Ridge province of Alabama

1976; Geological Society of America; Volume: 87; Issue: 3 Linguagem: Inglês

10.1130/0016-7606(1976)87 2.0.co;2

1943-2674

Charles E. Shaw,

Geological and Geochemical Analysis

Research Article| March 01, 1976 Large-scale recumbent folding in the Valley and Ridge province of Alabama CHARLES E. SHAW CHARLES E. SHAW 1Weaver Oil and Gas Corporation, 2700 S. Post Oak Road, Suite 1500, Houston, Texas 77027 Search for other works by this author on: GSW Google Scholar Author and Article Information CHARLES E. SHAW 1Weaver Oil and Gas Corporation, 2700 S. Post Oak Road, Suite 1500, Houston, Texas 77027 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1976) 87 (3): 407–418. https://doi.org/10.1130/0016-7606(1976)87 2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation CHARLES E. SHAW; Large-scale recumbent folding in the Valley and Ridge province of Alabama. GSA Bulletin 1976;; 87 (3): 407–418. doi: https://doi.org/10.1130/0016-7606(1976)87 2.0.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 SocietyGSA Bulletin Search Advanced Search Abstract Large-scale recumbent folds are recognized in the Coosa Valley in Shelby and Talladega Counties, Alabama, on the basis of map pattern, structural data gathered in the field, and top sense derived from stratigraphic sequence and primary sedimentary features. Recumbent folds at two structural levels deform rocks ranging in age from Ordovician to Mississippian.The structure evolved in three stages. Westward-directed recumbent folding about north-trending axes in Early Mississippian time was followed by refolding about upright northeast-trending axes in Pennsylvanian or later time. During or after the late folding, the area was arched by a broad, gently southeast-plunging cross anticline over which northeast structural axes were locally rotated to north-south and east-west trends.Recumbent folding was accompanied by soft-sediment deformation within the Mississippian Floyd Shale, which in Shelby County is interpreted as flysch that was deposited during this folding. The Floyd grades upward and laterally into marine molasse (Parkwood Formation) and later into nonmarine molasse (Pottsville Formation) of Pennsylvanian age. Mississippian Floyd Shale is the youngest unit involved in the recumbent folding.The Alabama nappes probably were formed by gravitational sliding of cover rocks toward the west or southwest into the Floyd flysch basin. 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.