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
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:667dd735b97e6ba802201b295aac69fa2d17a863eda8406b5a7e92a72d685807
Download URL:

https://repository.library.noaa.gov/view/noaa/31450/noaa_31450_DS1.pdf
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Sycamore Knoll: A wave-planed pop-up structure in a sinistral-oblique thrust system, Southern California Continental Borderland

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