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Interior channels in Martian valley networks: Discharge and runoff production

2005; Geological Society of America; Volume: 33; Issue: 6 Linguagem: Inglês

10.1130/g21333.1

1943-2682

R. P. Irwin, R. A. Craddock, A. D. Howard,

Space Exploration and Technology

Research Article| June 01, 2005 Interior channels in Martian valley networks: Discharge and runoff production Rossman P. Irwin, III; Rossman P. Irwin, III 1Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, 6th Street and Independence Avenue SW, Washington, DC 20013-7012, USA, and Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia 22904, USA Search for other works by this author on: GSW Google Scholar Robert A. Craddock; Robert A. Craddock 2Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, 6th Street and Independence Avenue SW, Washington, DC 20013-7012, USA Search for other works by this author on: GSW Google Scholar Alan D. Howard Alan D. Howard 3Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia 22904, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Rossman P. Irwin, III 1Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, 6th Street and Independence Avenue SW, Washington, DC 20013-7012, USA, and Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia 22904, USA Robert A. Craddock 2Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, 6th Street and Independence Avenue SW, Washington, DC 20013-7012, USA Alan D. Howard 3Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia 22904, USA Publisher: Geological Society of America Received: 01 Nov 2004 Revision Received: 02 Feb 2005 Accepted: 05 Feb 2005 First Online: 03 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2005) 33 (6): 489–492. https://doi.org/10.1130/G21333.1 Article history Received: 01 Nov 2004 Revision Received: 02 Feb 2005 Accepted: 05 Feb 2005 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Rossman P. Irwin, Robert A. Craddock, Alan D. Howard; Interior channels in Martian valley networks: Discharge and runoff production. Geology 2005;; 33 (6): 489–492. doi: https://doi.org/10.1130/G21333.1 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 SocietyGeology Search Advanced Search Abstract The highland valley networks are perhaps the most compelling evidence for widespread fluvial activity on Mars >3.5 Ga. However, determining the hydrology of these features has been difficult owing to poor image resolution and the lack of available topographic data. New orbital imaging reveals 21 late-stage channels within valley networks, which we use to estimate formative discharges and to evaluate water supply mechanisms. We find that channel width and associated formative discharge are comparable to terrestrial valley networks of similar area and relief. For 15 narrow channels in basin-filling networks, likely episodic runoff production rates up to centimeters per day and first-order formative discharges of ∼300–3000 m3/s are similar to terrestrial floods supplied by precipitation. Geothermal melting of ground ice would produce discharges ∼100 times smaller per unit area and would require pulsed outbursts to form the channels. In four large valleys with few tributaries, wider channels may represent large subsurface outflows or paleolake overflows, as these four channels originate at breached basin divides and/or near source regions for the catastrophic outflow channels. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.