Stratigraphic evidence for seven meters of dextral slip on the San Andreas fault during the 1857 earthquake in the Carrizo Plain

The smallest geomorphic offsets along a 35 km section of the San Andreas fault in the Carrizo Plain vary from 7 to 10 m. Our three-dimensional excavation of alluvial deposits a few km southeast of Wallace Creek confirms that at least 6.6 to 6.9 m of dextral slip occurred there during the latest larg...

Full description

Saved in:
Bibliographic Details
Main Authors: Sieh, Kerry, Grant, Lisa B.
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/95491
http://hdl.handle.net/10220/9351
http://bssa.geoscienceworld.org/content/83/3/619.abstract
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-95491
record_format dspace
spelling sg-ntu-dr.10356-954912019-12-06T19:15:54Z Stratigraphic evidence for seven meters of dextral slip on the San Andreas fault during the 1857 earthquake in the Carrizo Plain Sieh, Kerry Grant, Lisa B. The smallest geomorphic offsets along a 35 km section of the San Andreas fault in the Carrizo Plain vary from 7 to 10 m. Our three-dimensional excavation of alluvial deposits a few km southeast of Wallace Creek confirms that at least 6.6 to 6.9 m of dextral slip occurred there during the latest large earthquake, in 1857. Dates on detrital charcoal suggest that the last event prior to the 1857 earthquake occurred before a date within the range A.D. 1305 to 1623. The 3-m range in smallest offsets along this portion of the fault may reflect either a 3-m variation in slip along the San Andreas in 1857, or 2 to 3 m of slip during an event prior to 1857. Observations made after the recent Landers earthquake are compatible with the hypothesis of large, local variations in slip during a single earthquake, but do not explain the cause of such variations. Off-fault dextral rotations would be one plausible explanation. However, paleoseismic data in the Carrizo Plain are too sparse to allow rejection of the alternative hypothesis that slip in the event prior to 1857 was only 2 to 3 m, an amount of slip which would be several times too small to fit a time-predictable model. 2013-03-07T07:16:02Z 2019-12-06T19:15:54Z 2013-03-07T07:16:02Z 2019-12-06T19:15:54Z 1993 1993 Journal Article GRANT, L. B., & SIEH, K. (1993). Stratigraphic evidence for seven meters of dextral slip on the San Andreas Fault during the 1857 earthquake in the Carrizo Plain. Bulletin of the Seismological Society of America, 83(3), 619-635. 0037-1106 https://hdl.handle.net/10356/95491 http://hdl.handle.net/10220/9351 http://bssa.geoscienceworld.org/content/83/3/619.abstract en Bulletin of the seismological society of America © 1993 Seismological Society of America
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description The smallest geomorphic offsets along a 35 km section of the San Andreas fault in the Carrizo Plain vary from 7 to 10 m. Our three-dimensional excavation of alluvial deposits a few km southeast of Wallace Creek confirms that at least 6.6 to 6.9 m of dextral slip occurred there during the latest large earthquake, in 1857. Dates on detrital charcoal suggest that the last event prior to the 1857 earthquake occurred before a date within the range A.D. 1305 to 1623. The 3-m range in smallest offsets along this portion of the fault may reflect either a 3-m variation in slip along the San Andreas in 1857, or 2 to 3 m of slip during an event prior to 1857. Observations made after the recent Landers earthquake are compatible with the hypothesis of large, local variations in slip during a single earthquake, but do not explain the cause of such variations. Off-fault dextral rotations would be one plausible explanation. However, paleoseismic data in the Carrizo Plain are too sparse to allow rejection of the alternative hypothesis that slip in the event prior to 1857 was only 2 to 3 m, an amount of slip which would be several times too small to fit a time-predictable model.
format Article
author Sieh, Kerry
Grant, Lisa B.
spellingShingle Sieh, Kerry
Grant, Lisa B.
Stratigraphic evidence for seven meters of dextral slip on the San Andreas fault during the 1857 earthquake in the Carrizo Plain
author_facet Sieh, Kerry
Grant, Lisa B.
author_sort Sieh, Kerry
title Stratigraphic evidence for seven meters of dextral slip on the San Andreas fault during the 1857 earthquake in the Carrizo Plain
title_short Stratigraphic evidence for seven meters of dextral slip on the San Andreas fault during the 1857 earthquake in the Carrizo Plain
title_full Stratigraphic evidence for seven meters of dextral slip on the San Andreas fault during the 1857 earthquake in the Carrizo Plain
title_fullStr Stratigraphic evidence for seven meters of dextral slip on the San Andreas fault during the 1857 earthquake in the Carrizo Plain
title_full_unstemmed Stratigraphic evidence for seven meters of dextral slip on the San Andreas fault during the 1857 earthquake in the Carrizo Plain
title_sort stratigraphic evidence for seven meters of dextral slip on the san andreas fault during the 1857 earthquake in the carrizo plain
publishDate 2013
url https://hdl.handle.net/10356/95491
http://hdl.handle.net/10220/9351
http://bssa.geoscienceworld.org/content/83/3/619.abstract
_version_ 1681037491205832704