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Miocene to recent structural development of an extensional accommodation zone, northeastern Baja California, Mexico

Stock, J. M. and Hodges, K. V. (1990) Miocene to recent structural development of an extensional accommodation zone, northeastern Baja California, Mexico. Journal of Structural Geology, 12 (3). pp. 315-328. ISSN 0191-8141. doi:10.1016/0191-8141(90)90016-R.

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The Gulf of California Extensional Province in northeastern Baja California contains a major structural transition from a northern domain of widely spaced basins and ranges to a southern domain of closely spaced, NNW-striking high-angle faults. In the northern domain, the western boundary of the province (the Main Gulf Escarpment) is a single listric normal fault, the San Pedro Mártir fault; in the southern domain it is a 5 km wide zone of numerous E-dipping high-angle normal faults. The western half of this structural transition, studied here, does not occur by a single ‘transfer fault’ but rather by: (1) transfer of displacement from the San Pedro Mártir fault onto multiple fault zones in the footwall, without intervening cross-faults; and (2) increased southward disruption of the hanging wall by WNW-striking strike-slip faults (oblique to the extension direction) and NNW-striking normal faults and extension fractures. This structural transition involves both the hanging wall and the footwall of the escarpment. The lack of a discrete transfer structure is attributed either to insufficient extension (<10%) or to a gradual change in geometry of the basal detachment.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Stock, J. M.0000-0003-4816-7865
Hodges, K. V.0000-0003-2805-8899
Additional Information:© 1990 Pergamon Press plc. Received 6 June 1989; accepted in revised form 6 October 1989. Clarence Allen, R. Gordon Gastil and John Shelton lent aerial photographs. H. Ryan, L. Clark, K. McCloskey, K. Whidden, S. Wdowinski. G. Zwart and B. Sheffels assisted in the field. David Montaño granted permission to map on his land, and Francisco Suárez V. of the Centro de lnvestigación Científica y Educación Superior de Ensenada (CICESE) helped with logistics. Robert Fleck of the U.S.G.S. provided access to the geochronology lab in Menlo Park for dating samples. Acknowledgement is made to the donors of the Petroleum Research Fund, administered by the American Chemical Society, for partial support of this project, via grants to K. V. Hodges and to J. M. Stock. Additional funding came from a GSA Penrose grant, and from the Society of Sigma Xi. J. Stock's graduate work at MIT was funded by a fellowship from the Fannie and John Hertz Foundation. Reviews by W. Bosworth, K. McClay, and an anonymous reviewer are gratefully acknowledged.
Group:Seismological Laboratory
Funding AgencyGrant Number
American Chemical Society Petroleum Research FundUNSPECIFIED
Geological Society of America Penrose Bequest Research GrantsUNSPECIFIED
Sigma-Xi Grants in Aid of ResearchUNSPECIFIED
Fannie and John Hertz FoundationUNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20140908-103153269
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Official Citation:J.M. Stock, K.V. Hodges, Miocene to recent structural development of an extensional accommodation zone, northeastern Baja California, Mexico, Journal of Structural Geology, Volume 12, Issue 3, 1990, Pages 315-328, ISSN 0191-8141, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49337
Deposited By: Tony Diaz
Deposited On:08 Sep 2014 17:49
Last Modified:10 Nov 2021 18:42

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