Kink Band Structures in the Valley and Ridge Province, Central Pennsylvania

Research Article| December 01, 1969 Kink Band Structures in the Valley and Ridge Province, Central Pennsylvania RODGER T FAILL RODGER T FAILL Pennsylvania Geological Survey, Harrisburg, Pennsylvania 17120 Search for other works by this author on: GSW Google Scholar Author and Article Information RODGER T FAILL Pennsylvania Geological Survey, Harrisburg, Pennsylvania 17120 Publisher: Geological Society of America Received: 03 Mar 1969 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1969, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1969) 80 (12): 2539–2550. https://doi.org/10.1130/0016-7606(1969)80[2539:KBSITV]2.0.CO;2 Article history Received: 03 Mar 1969 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation RODGER T FAILL; Kink Band Structures in the Valley and Ridge Province, Central Pennsylvania. GSA Bulletin 1969;; 80 (12): 2539–2550. doi: https://doi.org/10.1130/0016-7606(1969)80[2539:KBSITV]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 The dominant structures of the Valley and Ridge province in central Pennsylvania are traditionally thought to be open, concentric folds of great length and parallel to one another. However, the majority of the folds possess planar limbs and narrow hinges and therefore do not conform to the concentric fold geometry. Furthermore, many folds change radically in profile along trend, and even vanish.Parallel-sided zones of rotated bedding, as much as 50 feet in width, have been observed transecting bedding at a large angle. The zone boundaries are defined by the abrupt flexure of the bedding, which is continuous across the structures and of constant thickness. Slickensides on bedding surfaces indicate that the flexural slip mechanism was operative in the development of these structures. Because of this geometry and because of the inferred deformational mechanism, these structures are interpreted as large kink bands.Structural models which utilize the kink band concept accurately represent the fold geometry both in the cross sections and the changes along trend. Because folds ranging in size from a few feet to the largest in the province can be represented by such models, it is suggested that kink banding was an important deformational process in the development of the fold geometry. 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.