GEOMETRY OF SUPERPOSED FOLDING

Abstract

Research Article| January 01, 1959 GEOMETRY OF SUPERPOSED FOLDING L. E WEISS L. E WEISS DEPARTMENT OF GEOLOGY, UNIVERSITY OF CALIFORNIA, BERKELEY 4, CALIFORNIA Search for other works by this author on: GSW Google Scholar Author and Article Information L. E WEISS DEPARTMENT OF GEOLOGY, UNIVERSITY OF CALIFORNIA, BERKELEY 4, CALIFORNIA Publisher: Geological Society of America Received: 06 Feb 1958 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1959, 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 (1959) 70 (1): 91–106. https://doi.org/10.1130/0016-7606(1959)70[91:GOSF]2.0.CO;2 Article history Received: 06 Feb 1958 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation L. E WEISS; GEOMETRY OF SUPERPOSED FOLDING. GSA Bulletin 1959;; 70 (1): 91–106. doi: https://doi.org/10.1130/0016-7606(1959)70[91:GOSF]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 Two simple kinematic models of folding in tectonites have been adopted and diagrams prepared to show ideal geometrical transformations of a set of parallel surfaces (S) as a result of superposition of one generation of folds on another.It was found for both models of folding that a second generation does not necessarily form folds with constant trend and plunge. These folds depend for their axial orientation on the attitude of S in which they form. It was found also that cylindroidal folds of a second generation are necessarily smaller and less persistent in axial direction than those of an earlier generation.Geometry of rotation of early formed B lineations by later folding is different for the two models of folding adopted. Where the second folding is by flexural slip of S, the earlier lineations follow small-circle paths in projection, as described by Sander. Where S is slip-folded by the second deformation, earlier lineations ideally follow great-circle paths in projection. Some departures from this ideal geometry to be expected in nature are listed. 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.