Journal article
Stratigraphy and 40Ar/39Ar geochronology of the Santa Rosa basin, Baja California: Dynamic evolution of a constrictional rift basin during oblique extension in the Gulf of California
C Seiler, MC Quigley, JM Fletcher, D Phillips, AJW Gleadow, BP Kohn
Basin Research | WILEY | Published : 2013
DOI: 10.1111/bre.12004
Abstract
The Santa Rosa basin of northeastern Baja California is one of several transtensional basins that formed during Neogene oblique opening of the Gulf of California. The basin comprises Late Miocene to Pleistocene sedimentary and volcanic strata that define an asymmetric half-graben above the Santa Rosa detachment, a low-angle normal fault with ca. 4-5 km of SE-directed displacement. Stratigraphic analysis reveals systematic basin-scale facies variations both parallel and across the basin. The basin-fill exhibits an overall fining-upward cycle, from conglomerate and breccia at the base to alternating sandstone-mudstone in the depocentre, which interfingers with the fault-scarp facies of the det..
View full abstractGrants
Awarded by ARC
Awarded by CONACYT
Awarded by NSF
Awarded by Australian Research Council
Funding Acknowledgements
This research was supported by ARC grants DP06651274 and DP1092861 to AG and BK, and by CONACYT grant #81463 and NSF EAR-0739017 Sub-Award 08-004375-01 to JF. The <SUP>40</SUP>Ar/<SUP>39</SUP>Ar laboratory at the University of Melbourne receives infrastructure support under the Au-Scope Program of NCRIS. We thank Yvonne Kunz for the invaluable support and assistance in the field and Stanislav Szczepanski for technical assistance in the <SUP>40</SUP>Ar/<SUP>39</SUP>Ar lab. The paper benefited from careful and constructive reviews by Rebecca Dorsey, Paul Umhoefer and Emmanuel Masini and editorial oversight by Peter van der Beek.