Tectonic geomorphology of the southeastern Mississippi Embayment in northern Mississippi, USA

Abstract

Research Article| September 01, 2006 Tectonic geomorphology of the southeastern Mississippi Embayment in northern Mississippi, USA Julio Garrote; Julio Garrote 1Department Geodinamica, Faculty Geología, Universidad Complutense de Madrid, Av. Complutense s/n, 28040 Madrid, Spain Search for other works by this author on: GSW Google Scholar Randel Tom Cox; Randel Tom Cox 2Earth Sciences Department, G-1 Johnson Hall, University of Memphis, Memphis, Tennessee 38152, USA Search for other works by this author on: GSW Google Scholar Charles Swann; Charles Swann 3Mississippi Mineral Resources Institute, 220 Old Chemistry Building, University of Mississippi, University, Mississippi 38677, USA Search for other works by this author on: GSW Google Scholar Michael Ellis Michael Ellis 4Center for Earthquake Research and Information, University of Memphis, Memphis, Tennessee 38152, USA Search for other works by this author on: GSW Google Scholar GSA Bulletin (2006) 118 (9-10): 1160–1170. https://doi.org/10.1130/B25721.1 Article history received: 14 Sep 2004 rev-recd: 03 Apr 2006 accepted: 18 Apr 2006 first online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Julio Garrote, Randel Tom Cox, Charles Swann, Michael Ellis; Tectonic geomorphology of the southeastern Mississippi Embayment in northern Mississippi, USA. GSA Bulletin 2006;; 118 (9-10): 1160–1170. doi: https://doi.org/10.1130/B25721.1 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 We analyzed drainage-basin geometry in part of the southeastern Mississippi Embayment near the New Madrid seismic zone in order to detect areas of lateral stream migration that could indicate recent tectonism. Toward this goal, a field of drainage-basin asymmetry vectors was generated from a digital terrain model and compared to geologic structure, lithofacies, seismicity, remotely sensed lineaments, and major drainage divides.Transverse topographical drainage-basin asymmetry (T-index) results define geomorphic domains in northern Mississippi (33° to 35°N, 88.5° to 90.25°W) that may reflect deep crustal blocks bounded by active faults or flexures. T-index measurements (a proxy for lateral stream migration) of more than 4500 second-order drainage basins produced a two-dimensional field of 282 spatially averaged vectors from which we interpreted 12 domains. Some domain boundaries correspond to mapped faults of two Paleozoic fault systems in our study area, the northeast-striking Mississippi Valley graben system and the northwest-striking Ouachita thrust belt and foreland faults. Several other prominent domain boundaries may be previously unmapped faults (flexures?) parallel to these systems. This interpretation is supported by satellite image analysis of the northeastern study area, which reveals lineaments consistent with our domain boundaries that have strikes that reflect the regional subsurface structural grain. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.