Till Fabric Control by Clast Shape

Research Article| February 01, 1974 Till Fabric Control by Clast Shape LON D. DRAKE LON D. DRAKE 1Department of Geology, University of Iowa, Iowa City, Iowa 52242 Search for other works by this author on: GSW Google Scholar Author and Article Information LON D. DRAKE 1Department of Geology, University of Iowa, Iowa City, Iowa 52242 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1974) 85 (2): 247–250. https://doi.org/10.1130/0016-7606(1974)85<247:TFCBCS>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 MailTo Tools Icon Tools Get Permissions Search Site Citation LON D. DRAKE; Till Fabric Control by Clast Shape. GSA Bulletin 1974;; 85 (2): 247–250. doi: https://doi.org/10.1130/0016-7606(1974)85<247:TFCBCS>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 Fabric data from 10 basal till sites in New Hampshire indicate that the shape of a pebble exerts a strong influence on its orientation in the till. Using Zingg shape definitions, A axes of rods are well aligned in the ice flow direction; those of blades are less so. Spheres and discs have weaker fabrics which still trend parallel to the ice flow direction. The A axes of all shapes tend to be slightly imbricated. Detailed study of movements of the extreme shapes and transitions between them was made by further subdividing the four Zingg shape classes. Transverse fabrics appear to be produced neither by extreme rods nor highly prolate shapes, but by pebbles whose shapes are near the common intersection of the four Zingg shape classes. 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.