Sub-decadal turbidite frequency during the early Holocene: Eel Fan, offshore northern California
Sub-decadal turbidite frequency during the early Holocene: Eel Fan, offshore northern California
Remotely operated and autonomous underwater vehicle technologies were used to image and sample exceptional deep sea outcrops where an ~100-m-thick section of turbidite beds is exposed on the headwalls of two giant submarine scours on Eel submarine fan, offshore northern California (USA). These outcrops provide a rare opportunity to connect young deep-sea turbidites with their feeder system. 14C measurements reveal that from 12.8 ka to 7.9 ka, one turbidite was being emplaced on average every 7 yr. This emplacement rate is two to three orders of magnitude higher than observed for turbidites elsewhere along the Pacific margin of North America. The turbidites contain abundant wood and shallow-dwelling foraminifera, demonstrating an efficient connection between the Eel River source and the Eel Fan sink. Turbidite recurrence intervals diminish fivefold to ~36 yr from 7.9 ka onward, reflecting sea-level rise and re-routing of Eel River sediments.
855-858
Paull, C.K.
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McGann, M.
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Sumner, E.J.
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Barnes, P.M.
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Lundsten, E.M.
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Anderson, K.
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Gwiazda, R.
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Edwards, B.
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Caress, D.W.
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October 2014
Paull, C.K.
baf105b3-905a-4994-86bb-69cb5ec95743
McGann, M.
cc6c59e8-211f-4799-ba68-0385e205c2c5
Sumner, E.J.
dbba4b92-89cc-45d9-888e-d0e87e5c10ac
Barnes, P.M.
83833300-fb73-4774-b563-65dfd8e22ca9
Lundsten, E.M.
6acbed62-51b0-4263-9de3-0247760cf073
Anderson, K.
ef4598bc-7bac-4a63-8d41-ec30d6cfd2b6
Gwiazda, R.
d8ca5107-45cd-4e45-9e33-9ca402f6c61c
Edwards, B.
7599487e-34d4-48bc-9bea-b26f2f3c35fc
Caress, D.W.
426db380-03e0-49db-886e-d87e1259eccb
Paull, C.K., McGann, M., Sumner, E.J., Barnes, P.M., Lundsten, E.M., Anderson, K., Gwiazda, R., Edwards, B. and Caress, D.W.
(2014)
Sub-decadal turbidite frequency during the early Holocene: Eel Fan, offshore northern California.
Geology, 42 (10), .
(doi:10.1130/G35768.1).
Abstract
Remotely operated and autonomous underwater vehicle technologies were used to image and sample exceptional deep sea outcrops where an ~100-m-thick section of turbidite beds is exposed on the headwalls of two giant submarine scours on Eel submarine fan, offshore northern California (USA). These outcrops provide a rare opportunity to connect young deep-sea turbidites with their feeder system. 14C measurements reveal that from 12.8 ka to 7.9 ka, one turbidite was being emplaced on average every 7 yr. This emplacement rate is two to three orders of magnitude higher than observed for turbidites elsewhere along the Pacific margin of North America. The turbidites contain abundant wood and shallow-dwelling foraminifera, demonstrating an efficient connection between the Eel River source and the Eel Fan sink. Turbidite recurrence intervals diminish fivefold to ~36 yr from 7.9 ka onward, reflecting sea-level rise and re-routing of Eel River sediments.
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e-pub ahead of print date: 15 August 2014
Published date: October 2014
Organisations:
Geology & Geophysics
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Local EPrints ID: 368482
URI: http://eprints.soton.ac.uk/id/eprint/368482
ISSN: 0091-7613
PURE UUID: cf115e23-cbe6-42bb-8ba8-47320df10bad
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Date deposited: 16 Sep 2014 09:27
Last modified: 14 Mar 2024 17:48
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Author:
C.K. Paull
Author:
M. McGann
Author:
P.M. Barnes
Author:
E.M. Lundsten
Author:
K. Anderson
Author:
R. Gwiazda
Author:
B. Edwards
Author:
D.W. Caress
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