Wave-Base, Marine Profile of Equilibrium, and Wave-Built Terraces: Discussion

Research Article| December 01, 1964 WAVE-BASE, MARINE PROFILE OF EQUILIBRIUM, AND WAVE-BUILT TERRACES: DISCUSSION DAVID G MOORE; DAVID G MOORE U. S. NAVY ELECTRONICS LABORATORY, SAN DIEGO, CALIF.; SCRIPPS INSTITUTION OF OCEANOGRAPHY, LA JOLLA, CALIF. Search for other works by this author on: GSW Google Scholar JOSEPH R CURRAY JOSEPH R CURRAY U. S. NAVY ELECTRONICS LABORATORY, SAN DIEGO, CALIF.; SCRIPPS INSTITUTION OF OCEANOGRAPHY, LA JOLLA, CALIF. Search for other works by this author on: GSW Google Scholar GSA Bulletin (1964) 75 (12): 1267–1273. https://doi.org/10.1130/0016-7606(1964)75[1267:WMPOEA]2.0.CO;2 Article history received: 22 Nov 1963 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 DAVID G MOORE, JOSEPH R CURRAY; WAVE-BASE, MARINE PROFILE OF EQUILIBRIUM, AND WAVE-BUILT TERRACES: DISCUSSION. GSA Bulletin 1964;; 75 (12): 1267–1273. doi: https://doi.org/10.1130/0016-7606(1964)75[1267:WMPOEA]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 Some concepts presented in a recent paper by Dietz (1963) can be enlarged upon with an attempt to emphasize what are believed to be shortcomings. Other concepts can be negated by newer field evidence.The old concept of wave-base should not be completely discarded but should be modified in accordance with present knowledge of the transportation and deposition of sediments. Where modern rates of supply are high enough, sediment is transported to and deposited on the inner and central parts of continental shelves, generally with decrease of grain size offshore. The gradient in particle size cannot be predicted merely by considering instantaneous conditions but may theoretically be predicted over the net cyclic period of the region, perhaps in the range between 1 and 100 years. The effects of variations in energy and supply and the occurrence of extreme flood or storm conditions are thus averaged out. The morphological marine profile of equilibrium, a direct corollary, has not yet been attained on most continental shelves because of the effects of rapid, wide Quaternary fluctuations of sea level.Use of the terms delta, topset, foreset, and bottom-set should be restricted to known marine or lacustrine deltas. In particular, continental slope deposits should not be termed foresets unless they are of known deltaic origin.Dietz's model of the structure of the continental terrace is incorrect for the surveyed portions off the coasts of North America. The basic sedimentary framework of most of these continental terraces appears to be upbuilding by shelf and paralic facies and outbuilding by slope deposition. This basic structure is locally modified by salt-dome tectonics, folding, faulting, and mass slumping. The continental slope is believed to be predominantly a realm of deposition rather than of turbidity-current degradation. 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.