Research Article| September 01, 1973 Late Quaternary Sedimentation in the Active Eastern Aleutian Trench David J. W. Piper; David J. W. Piper 1Department of Geology, Dalhousie University, Halifax, Nova Scotia, Canada Search for other works by this author on: GSW Google Scholar Roland von Huene; Roland von Huene 2U.S. Geological Survey, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar John R. Duncan John R. Duncan 3ESSO Production Research Company, Houston, Texas 77001 Search for other works by this author on: GSW Google Scholar Geology (1973) 1 (1): 19–22. https://doi.org/10.1130/0091-7613(1973)1<19:LQSITA>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation David J. W. Piper, Roland von Huene, John R. Duncan; Late Quaternary Sedimentation in the Active Eastern Aleutian Trench. Geology 1973;; 1 (1): 19–22. doi: https://doi.org/10.1130/0091-7613(1973)1<19:LQSITA>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 SocietyGeology Search Advanced Search Abstract Sediments originally deposited on the Alaskan Abyssal Plain have been depressed to form the eastern Aleutian Trench. Simultaneously, a wedge of horizontally bedded sediments, about 1 km thick at its axis, has been deposited in the trench. The time-transgressive facies change between this wedge of sediment and the abyssal-plain sediment sequence shows up as a discontinuity on seismic records. Sediment is being deposited up to 10 times faster in the trench than on the abyssal plain. Ninety percent of the sediment in the trench arrived there by moving down the trench wall as slumps or in turbidity currents, and has been partly redistributed by turbidity currents flowing in a channel along the trench axis; 7 percent has come from the Surveyor Channel distribution system on the abyssal plain; and 3 percent is pelagic (mainly ice rafted). Sediments pass from a sandy facies near the trench wall to a silt-mud facies on the abyssal plain. If a similar trench were exposed on land, the stratigraphic sequence would consist of sandstone grading transitionally downward into shale, and then into an abyssal-plain sequence. Sediment fill in the Aleutian Trench is abnormally thick as a result of Pleistocene glaciation; Neogene trench-fill sediments would be less than 800 m thick. 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.
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