FN Archimer Export Format
PT J
TI Daily bathymetric surveys document how stratigraphy is built and its extreme incompleteness in submarine channels
BT 
AF VENDETTUOLI, D.
   CLARE, M. A.
   CLARKE, J. E. Hughes
   VELLINGA, A.
   HIZZET, J.
   HAGE, Sophie
   CARTIGNY, M. J. B.
   TALLING, P. J.
   WALTHAM, D.
   HUBBARD, S. M.
   STACEY, C.
   LINTERN, D. G.
AS 1:1,2;2:1;3:3;4:1,2;5:1,2;6:1,4;7:4;8:4;9:5;10:6;11:7;12:7;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;
C1 Univ Southampton, Natl Oceanog Ctr, Waterfront Campus, Southampton SO14 3ZH, Hants, England.
   Univ Southampton, Ocean & Earth Sci, Southampton SO14 3ZH, Hants, England.
   Univ New Hampshire, Ctr Coastal & Ocean Mapping, Durham, NH 03824 USA.
   Univ Durham, Dept Geog & Earth Sci, Durham, England.
   Royal Holloway Univ London, Dept Earth Sci, London, England.
   Univ Calgary, Dept Geosci, Calgary, AB T2N 1N4, Canada.
   Geol Survey Canada, Inst Ocean Sci, Ottawa, ON, Canada.
C2 UNIV SOUTHAMPTON, UK
   UNIV SOUTHAMPTON, UK
   UNIV NEW HAMPSHIRE, USA
   UNIV DURHAM, UK
   UNIV ROYAL HOLLOWAY LONDON, UK
   UNIV CALGARY, CANADA
   GEOL SURVEY CANADA, CANADA
IF 4.823
TC 54
UR https://archimer.ifremer.fr/doc/00730/84236/89173.pdf
   https://archimer.ifremer.fr/doc/00730/84236/89174.docx
   https://archimer.ifremer.fr/doc/00730/84236/89175.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89176.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89177.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89178.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89179.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89180.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89181.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89182.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89183.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89184.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89185.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89203.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89204.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89205.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89206.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89207.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89208.mp4
   https://archimer.ifremer.fr/doc/00730/84236/89209.mp4
LA English
DT Article
DE ;stratigraphic completeness;submarine channel;turbidity current;crescentic bedform;submarine landslide;channel-lobe transition zone
AB Turbidity currents are powerful flows of sediment that pose a hazard to critical seafloor infrastructure and transport globally important amounts of sediment to the deep sea. Due to challenges of direct monitoring, we typically rely on their deposits to reconstruct past turbidity currents. Understanding these flows is complicated because successive flows can rework or erase previous deposits. Hence, depositional environments dominated by turbidity currents, such as submarine channels, only partially record their deposits. But precisely how incomplete these deposits are, is unclear. Here we use the most extensive repeat bathymetric mapping yet of any turbidity current system, to reveal the stratigraphic evolution of three submarine channels. We re-analyze 93 daily repeat surveys performed over four months at the Squamish submarine delta, British Columbia in 2011, during which time >100 turbidity currents were monitored. Turbidity currents deposit and rework sediments into upstream-migrating bedforms, ensuring low rates of preservation (median 11%), even on the terminal lobes. Large delta-lip collapses (up to 150,000 m(3)) are relatively well preserved, however, due to their rapidly emplaced volumes, which shield underlying channel deposits from erosion over the surveyed timescale. The biggest gaps in the depositional record relate to infrequent powerful flows that cause significant erosion, particularly at the channel-lobe transition zone where no deposits during our monitoring period are preserved. Our analysis of repeat surveys demonstrates how incomplete the stratigraphy of submarine channels can be, even over just 4 months, and provides a new approach to better understand how the stratigraphic record is built and preserved in a wider range of marine settings. (C) 2019 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
PY 2019
PD JUL
SO Earth And Planetary Science Letters
SN 0012-821X
PU Elsevier
VL 515
UT 000466251400022
BP 231
EP 247
DI 10.1016/j.epsl.2019.03.033
ID 84236
ER

EF