The Maximum Slope-Angle Attainable by Surfaces Underlain by Bulked Equal Spheroids with Variable Dimensional Ordering

Research Article| October 01, 1969 The Maximum Slope-Angle Attainable by Surfaces Underlain by Bulked Equal Spheroids with Variable Dimensional Ordering J. R. L ALLEN J. R. L ALLEN Sedimentology Research Laboratory, Department of Geology, The University, Reading, United Kingdom Search for other works by this author on: GSW Google Scholar Author and Article Information J. R. L ALLEN Sedimentology Research Laboratory, Department of Geology, The University, Reading, United Kingdom Publisher: Geological Society of America Received: 15 Jan 1969 Revision Received: 11 Apr 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 (10): 1923–1930. https://doi.org/10.1130/0016-7606(1969)80[1923:TMSABS]2.0.CO;2 Article history Received: 15 Jan 1969 Revision Received: 11 Apr 1969 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 J. R. L ALLEN; The Maximum Slope-Angle Attainable by Surfaces Underlain by Bulked Equal Spheroids with Variable Dimensional Ordering. GSA Bulletin 1969;; 80 (10): 1923–1930. doi: https://doi.org/10.1130/0016-7606(1969)80[1923:TMSABS]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 A theoretical model is advanced for the maximum slope angle (angle of initial yield) on the supposition that the average properties of haphazard arrangements of spheroidal particles can be statistically represented by a combination of two different regular packings in a proportion to give the original concentration. The tangent of the yield angle is found to be linearly proportional to the spheroid concentration, which in turn depends upon the axial ratio. The degree and kind of dimensional ordering of the particles can at will be made dependent upon or independent of the concentration. The equations differ slightly, and only in their constants, according to the choice of ordering. Because of the decisive influence of shape inequalities, and the lesser influence of ordering, it appears inadmissible to apply to natural sedimentary particles of ellipsoidal form a model of yield angle based on the sphere. The equations are therefore relevant to the problems of the slope angles assumed by screes and talus and the slip faces of ripples and dunes. 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.