Sycamore Knoll: A wave-planed pop-up structure in a sinistral-oblique thrust system, Southern California Continental Borderland

Williams, Ethan F.; Castillo, Chris M.; Klemperer, Simon L.; Raineault, Nicole A.; Gee, Lindsay

doi:10.1016/j.dsr2.2018.03.002

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Sycamore Knoll: A wave-planed pop-up structure in a sinistral-oblique thrust system, Southern California Continental Borderland

2018
By Williams, Ethan F. ; Castillo, Chris M. ; Klemperer, Simon L. ; ...
Source: Deep Sea Research Part II: Topical Studies in Oceanography, 150: 1-50

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Journal Title:

Deep Sea Research Part II: Topical Studies in Oceanography
Personal Author:

Williams, Ethan F. ; Castillo, Chris M. ; Klemperer, Simon L. ; Raineault, Nicole A. ; Gee, Lindsay

Williams, Ethan F. ; Castillo, Chris M. ; Klemperer, Simon L. ; Raineault, Nicole A. ; Gee, Lindsay Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; Ocean Exploration Program

OAR (Oceanic and Atmospheric Research) ; Ocean Exploration Program Less -
Description:

At the boundary between the Western Transverse Ranges province and Inner Continental Borderland of Southern California, strain is partitioned across the sinistral-oblique Anacapa-Dume Fault system. Sycamore Knoll, a pop-up structure 20 km west of Point Dume in the hanging wall of the north-dipping Anacapa-Dume Fault, stands out as an anomalous bathymetric high along the Southern California coast. We synthesize new and existing geophysical datasets, including multibeam bathymetry/backscatter and single/multichannel seismic, to understand the morphology and tectonic implications of Sycamore Knoll. We identify a complete eustatic low-stand submerged marine-terrace package encircling Sycamore Knoll platform that corresponds to the Last Glacial Maximum (LGM). The marine-terrace deposits and wave-planed surface of Sycamore Knoll require a late Quaternary uplift rate of 0.55 (+0.5/−0.3) mm/yr relative to sea-level. By combining our uplift rate with previous estimates of basin subsidence and a revised structural model of the Anacapa-Dume Fault, we determine a maximum slip rate in latest Quaternary time of 1.50 (+0.5/−0.3) mm/yr and hence a post-LGM rate of convergence across the Anacapa-Dume Fault of 0.60 (+0.2/−0.1) mm/yr.
Keywords:

[+]

E/V Nautilus Cruise ID NA072, Transverse Ranges, California Continental Borderland, Anacapa-Dume Fault, Fault-propagation Fold, Fault-bend Fold, Quaternary Sea-level, Last Glacial Maximum, Remotely Operated Vehicle, Telepresence OET (Ocean Exploration Trust)
Source:

Deep Sea Research Part II: Topical Studies in Oceanography, 150: 1-50
DOI:

https://doi.org/10.1016/j.dsr2.2018.03.002
Document Type:

Journal Article
Funding:

Grant no. NA17NOS4290190
Place as Subject:

California ; North Pacific Ocean

California ; North Pacific Ocean Less -
Rights Information:

Accepted Manuscript
Rights Statement:

The NOAA IR provides access to this content under the authority of the government's retained license to distribute publications and data resulting from federal funding. While users may legally access this content, the copyright owners retain rights that govern the reproduction, redistribution, and re-use of this work. The user is solely responsible for complying with applicable copyright law.
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha-512:fc2669c4c2c4f739c49907937b388efa5e3a1162dd9819ba8f273c5d309cc751c1700eb1c615e177dd2352be944b3b7fb8608aa186920cffdb94d38813280a32
Download URL:

https://repository.library.noaa.gov/view/noaa/31450/noaa_31450_DS1.pdf
File Type:

[PDF-54.61 MB]