The Stratigraphically Preserved Signature of Persistent Backwater Dynamics in a Large Paleodelta System: The Mungaroo Formation, North West Shelf, Australia

• DOI: 10.2110/jsr.2018.38
• Publication Date: 2018-07-31T13:40:46Z
• Authors: John Martin; Anjali M. Fernandes; Jennifer Pickering; Nick Howes; Simon Mann; Katja McNeil
• Keywords: Icon

Research Article| July 31, 2018 The Stratigraphically Preserved Signature of Persistent Backwater Dynamics in a Large Paleodelta System: Mungaroo Formation, North West Shelf, Australia John Martin; Martin 1Shell International Exploration and Production, Projects Technology, Houston, Texas 77082, U.S.A. Search for other works by this author on: GSW Google Scholar Anjali M. Fernandes; Fernandes 2Center Integrative Geosciences, University Connecticut at Storrs, 06269, Jennifer Pickering; Pickering Nick Howes; Howes Simon Mann; Mann 3Shell Malaysia, Ltd., Kuala Lumpur, KUL 50470, Indonesia Katja McNeil 4Shell Australia, Perth, WA 6000, Journal Sedimentary (2018) 88 (7): 850–872. https://doi.org/10.2110/jsr.2018.38 Article history first online: 31 Jul Cite View This Citation Add to Manager Share Icon Facebook Twitter LinkedIn Email Tools Get Permissions Site Martin, Fernandes, Pickering, Howes, Mann, McNeil; Australia. 2018;; doi: Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search nav input auto suggest filter All ContentBy SocietyJournal Advanced Abstract As large, deep rivers enter their coastal reaches, they are usually affected lengthy backwater zone. Recent studies have demonstrated pronounced geomorphic effects, such as channel deepening decreased lateral migration rates. These observations appear be linked variable fluxes sediment that characteristically vary discharge across segments. How do transport regime its depositional effects manifest stratigraphic architecture over geologic time? To address question, we mapped analyzed 700 belts from large (70,000 km2) seismic survey the Northern Carnarvon Basin, Following analysis measurements channel-belt patterns, propose stratigraphy was constructed continental-scale paleodelta it reveals record backwater-influenced deposition length scale 400 km. Width decay only weakly down system, manner similar lowermost reaches late Holocene Mississippi River, here invoked an analogous system. In addition, significant downstream fining system is interpreted wireline-log lithologic core data, trend also seen belt, where bank-attached bars fine due reduced contributions bedload. By comparing two systems, show trends expressed 103 year River 106 similar, each having generated slightly narrow but transition sand-rich heterolithic or mud-dominated along lower 30 50 percent reach. We present transtemporal model leverages quantitative data modern characterization ancient You not currently access article.