Magnetic stratigraphy and tectonic rotation of the Middle Eocene Matilija Sandstone and Cozy Dell Shale, Ventura County, California: implications for sequence stratigraphic correlations

Prothero, Donald R.; Britt, Justin R

doi:10.1016/s0012-821x(98)00192-7

Cited by 6 publications

(5 citation statements)

References 28 publications

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“…[ Hornafius et al , 1986; Liddicoat , 1990; Luyendyk , 1991]. Further support for these results is provided by paleomagnetic studies of Champion et al [1986], Liddicoat [1988], Prothero and Britt [1998], and Prothero and Rapp [2001]. Geodetic data suggest that these rotations are continuing at similar rates [ Jackson and Molnar , 1990; Donnellan et al , 1993; Molnar and Gipson , 1994].…”

Section: Introductionmentioning

confidence: 90%

Paleomagnetic definition of crustal fragmentation and Quaternary block rotations in the east Ventura Basin and San Fernando valley, southern California

Levi

Yeats

2003

Tectonics

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Paleomagnetic studies of the Pliocene‐Quaternary Saugus Formation in the eastern part of the western Transverse Ranges of California show that the crust is fragmented into small domains, tens of kilometers in linear dimension, identified by rotation of reverse‐fault blocks. In an area approximately 35 × 25 km in the San Fernando valley and east Ventura Basin we identified four distinct domains. Two domains, southwest of and adjacent to the San Gabriel fault, are rotated clockwise: (1) The Magic Mountain domain, R = 30° ± 5° and (2) the Merrick syncline domain, R = 34° ± 6°. The Magic Mountain domain has rotated since 1 Ma. Both rotated sections occur in hanging walls of active reverse faults, the Santa Susana and San Fernando faults, respectively. Structural data suggest that the fault tip of the Santa Susana fault is the rotation pivot of the Magic Mountain domain. Two additional blocks are unrotated: (1) the Van Norman Lake domain, directly south of the Santa Susana fault, and (2) the Soledad Canyon domain, immediately across the San Gabriel fault from the Magic Mountain domain, suggesting that the San Gabriel fault might be a domain boundary. Our results suggest that part of the clockwise rotation of some Miocene and older rocks in this area might have occurred in the Quaternary. The Plio‐Pleistocene fragmentation and clockwise rotations continue at present, based on geodetic data, and represent crustal response to diffuse, oblique dextral shearing within the San Andreas fault system.

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Section: Introductionmentioning

confidence: 90%

Paleomagnetic definition of crustal fragmentation and Quaternary block rotations in the east Ventura Basin and San Fernando valley, southern California

Levi

Yeats

2003

Tectonics

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“…The anomalous inclinations are most likely due in part to compaction processes in the sedimentary rocks [ Arason and Levi , 1990] and possibly related to secular variation in the volcanic rocks. Shallow inclinations are also a common characteristic of Mesozoic and Cenozoic rocks in the region that has been reported by many studies [e.g., McWilliams and Howell , 1982; Champion et al , 1984; Liddicoat , 1990; Prothero and Britt , 1998]. The specific cause of the regional inclination flattening is a subject of debate (discussed by Lund et al [1991]).…”

Section: Field and Laboratory Proceduresmentioning

confidence: 98%

“…Sites with error bars and locality numbers represent paleomagnetic data collected during this study. Other sites represent previously published data [ Kamerling and Luyendyk , 1979; Terres , 1984; Hornafius , 1985; Liddicoat , 1990; Whidden , 1994; Prothero and Britt , 1998]. Open circles represent sampled locations that did not yield acceptable data due to overprinting, weak magnetization, or large α 95 .…”

Section: Geologic Settingmentioning

confidence: 99%

Structures that accommodated differential vertical axis rotation of the western Transverse Ranges, California

Onderdonk

2005

Tectonics

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New paleomagnetic and structural data from the northwestern Transverse Ranges of California define the location, geometry, and kinematics of structures that facilitated differential vertical axis rotation. Paleomagnetic declinations in the southern Coast Ranges indicate negligible amounts of vertical axis rotation, which contrasts sharply with data from rocks of the same age in the western Transverse Ranges that record approximately 90° of clockwise rotation since early Miocene time. This change in paleomagnetic declinations occurs across an east‐west trending zone of reverse faults and folds that includes the western Big Pine–Pine Mountain fault, the Santa Ynez fault, and the structures in between. The structures in this zone exhibit increased amounts of shortening to the west such that the zone closed in a fan‐like fashion, resulting in rotation of the southern edge with respect to the northern edge. The new data and interpretations refine previous models of vertical axis rotation in southern California by describing the deformation present at rotation boundaries that allowed distinct areas to rotate relative to the surrounding crust.

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“…Donald E. Savage, who was McKenna's graduate advisor at Berkeley, was a pioneer in trying to apply rigorous biostratigraphic techniques (used by his invertebrate paleontologist colleagues at Berkeley) to the mammalian time scale. Savage (1951) described the Irvingtonian and Rancholabrean land mammal ages and later (Savage, 1955) published a paper proposing two formal biostratigraphic stages and ages (Cerrotejonian and Montediablan) for the California ''Pliocene'' (now considered middle to late Miocene; see Tedford et al, 1987;Woodburne and Swisher, 1995;Wilson and Prothero, 1997;Prothero and Tedford, 2000). These stages were consistent with the codes of stratigraphic nomenclature then in use.…”

Section: Introductionmentioning

confidence: 68%

Chapter 18: North American Mammalian Chronostratigraphy: The Contributions of Malcolm C. McKenna

Prothero¹

2004

Bulletin of the American Museum of Natural History

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Magnetic stratigraphy and tectonic rotation of the Middle Eocene Matilija Sandstone and Cozy Dell Shale, Ventura County, California: implications for sequence stratigraphic correlations

Cited by 6 publications

References 28 publications

Paleomagnetic definition of crustal fragmentation and Quaternary block rotations in the east Ventura Basin and San Fernando valley, southern California

Paleomagnetic definition of crustal fragmentation and Quaternary block rotations in the east Ventura Basin and San Fernando valley, southern California

Structures that accommodated differential vertical axis rotation of the western Transverse Ranges, California

Chapter 18: North American Mammalian Chronostratigraphy: The Contributions of Malcolm C. McKenna

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