Research Article| May 01, 2006 Quantitative geomorphology of the Mars Eberswalde delta Lesli J. Wood Lesli J. Wood 1Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas 78713-8924, USA Search for other works by this author on: GSW Google Scholar GSA Bulletin (2006) 118 (5-6): 557–566. https://doi.org/10.1130/B25822.1 Article history received: 16 Mar 2005 rev-recd: 13 Dec 2005 accepted: 29 Dec 2005 first online: 08 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 Lesli J. Wood; Quantitative geomorphology of the Mars Eberswalde delta. GSA Bulletin 2006;; 118 (5-6): 557–566. doi: https://doi.org/10.1130/B25822.1 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 The Eberswalde delta is composed of six separate depositional lobes that have pro-graded some 17 km from their apex. Cross-cutting distributary relationships and compensated depositional lobes are clearly visible in images acquired by the Mars Global Surveyor Mars Orbiter Camera. Here, several lobesystemshavebeenexaminedforsinuosity, radius of channel curvature, meander-bend width, and channel width parameters. Channel sinuosities of between 1.2 and 1.8 define low- to moderate-sinuosity systems typical of the type transporting bedload or mixed grain-size loads. Channel systems increase in sinuosity as they get older. However, some of the younger systems show specific reaches of increased sinuosity. These localized changes may be due to either abutment against resistant beds of older lobes or rise in base level at the channel system terminus. If the former, such an effect of older deposits on the morphology of the channels suggests that these older lobes were fairly well indurated prior to the deposition of the youngest progradational lobes. Eighty-six percent of distributaries in the Mars Eberswalde delta are 100–240 m wide. Comparatively, 62% and 44% of distributaries in the Atchafalaya and Wax Lake deltas of Louisiana, respectively, are of similar size. Small distributaries may indicate lower average and shorter duration flows or coarser sediment in Mars distributaries than those typical of the Gulf Coast systems. The volume of the material in the Mars deposit suggests long periods of sediment deposition. Sinuosity indexes, meander-bend migration, and ridge-and-swale point-bar topography suggest periods of stable discharge on the delta surface. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.