Benthonic Foraminiferal Zonation and Correlation of Late Cretaceous Strata in Great Valley of California: A Modification: ABSTRACT

Almgren, Alvin A.

doi:10.1306/94885741-1704-11d7-8645000102c1865d

Cited by 9 publications

(21 citation statements)

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“…Williams, 1997). Although this method entails uncertainties because of the use of depthrestricted genera, the correlation framework for benthic foraminifera established by Goudkoff (1945) and modifi ed by Almgren (1986) remains the best tool for correlating Great Valley strata. This study uses the subsurface stratigraphic nomenclature ( Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Well cuttings of mudstone and siltstone confi rm these readings. These fi ne-grained units are ~300 m thick, contain benthic f oraminifera of the D-2 and E zones (Goudkoff, 1945;Almgren, 1986), and correspond to the Sawtooth shale (Hoffman, 1964;Nilsen and Moore, 1997) of early Maastrichtian age ( Goudkoff, 1945; Almgren, 1986). These refl ectors are classifi ed as draping seismic facies (Table 1).…”

Section: Observationsmentioning

confidence: 99%

“…2) (Bartow and Nilsen, 1990). This marker generally separates D-1 to D-2 benthic zones (Almgren, 1986) and is used as a fl attening horizon for horizon slices and seismic sections. On the western edge of the 3D survey, refl ectors are eastwardly declined relative to those beneath and appear to downlap them (Fig.…”

Section: Package 2 Observationsmentioning

confidence: 99%

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Subduction complex uplift and exhumation and its influence on Maastrichtian forearc stratigraphy in the Great Valley Basin, northern San Joaquin Valley, California

Mitchell¹,

Graham²,

Suek³

2010

Geological Society of America Bulletin

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New 3D seismic-refl ection data from the northern San Joaquin Valley (Great Valley forearc basin), California, provide the fi rst convincing evidence of emergence and erosion of the Franciscan subduction complex during the Mesozoic. Syntectonic growth strata record an early Maastrichtian phase of deformation, which elevated the subduction complex above sea level. Once exposed, erosion generated a supply of sediment that built a progradational wedge (arcward) into bathyal waters of the forearc basin. The thickness and extent of these subduction complex-derived sediments argue for an areally extensive landmass located west of the forearc basin. Regional emergence of the subduction complex suggests that erosion served as a signifi cant driver in the exhumation of Franciscan blueschists.

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Section: Methodsmentioning

confidence: 99%

Section: Observationsmentioning

confidence: 99%

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Subduction complex uplift and exhumation and its influence on Maastrichtian forearc stratigraphy in the Great Valley Basin, northern San Joaquin Valley, California

Mitchell¹,

Graham²,

Suek³

2010

Geological Society of America Bulletin

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“…4; Chuber, 1961Chuber, , 1962Douglas, 1966;Ingersoll, 1976Ingersoll, , 1990Almgren, 1986;Moxon, 1990). Using a variety of outcrop and subsurface data sets, Moxon (1990) divided the Mesozoic and Cenozoic GVG into six major supersequences, three of which are relevant to this study: (1) JK (Upper Jurassic-Lower Cretaceous: Tithonian to Valanginian); (2) LK (Lower Cretaceous: Hauterivian to Albian); and (3) UK-1 (Upper Cretaceous: Cenomanian to Campanian).…”

Section: Great Valley Group Stratigraphymentioning

confidence: 99%

Facies architecture and provenance of a boulder-conglomerate submarine channel system, Panoche Formation, Great Valley Group: A forearc basin response to middle Cretaceous tectonism in the California convergent margin

Greene¹,

Surpless²

2017

Geosphere

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Tectonic reorganization induced by a rapid increase in plate motion obliquity and rate beginning at ca. 100 Ma affected California's Andean-style convergent margin, with concomitant changes in the accretionary prism of the Franciscan Complex, the Great Valley forearc basin, and the Sierran continental arc. Using facies analysis and a combined provenance approach, we suggest that this ca. 100 Ma tectonic signal is preserved in a Cenomanian (Upper Cretaceous) boulder-conglomerate outcrop along the San Luis Reservoir (SLR) in the southern Great Valley, which represents the thickest and coarsest deep-water deposit ever described in the Great Valley Group (GVG). We document a 1.8-km-thick by 4-km-long depositional-dip profile of an interpreted SE-directed (axial) submarine channel system that is part of a conglomeratic package that stretches 20 km along the east-central Diablo Range. Our facies analysis of the SLR area documents five facies associations within four aggradational channel complex sets, followed by regional abandonment.Sandstone petrography and mudrock geochemical data suggest a dissected continental Sierra Nevadan arc source. Conglomerate clast counts show abundant ophiolitic-type clasts that may be derived from the Coast Range Ophiolite and/or the Western Sierra Nevada Metamorphic Belt. Detrital-zircon geochronology data also indicate western and central Sierra Nevadan sources; however, we interpret an anomalous (relative to other Cenomanian localities) 105-95 Ma zircon population to indicate the initial erosional products from the volcanic carapace associated with the Late Cretaceous magmatic flare-up within the eastern Sierran arc. This flare-up has been linked to an increase in arc-parallel plate motion that induced deformation along shear zones in the eastern Sierra Nevada, allowing for widespread plutonism. Our provenance interpretation makes the SLR area the earliest Upper Cretaceous GVG locality to receive significant detritus from the flare-up, effectively linking tectonic plate motion changes and coarse-grained, deep-water forearc sedimentation.

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“…Calcareous nannofossils: CP zones, Okada and Bukry (1980); Palynomorphs: age or stage, Williams and Bujak (1985); Planktonic foraminifers: P zones, Blow (1969), as emended by Toumarkine and Luterbacher (1985); and Benthic foraminifers: H-C zones, Goudkoff (1945), as emended by Almgren (1986) for Upper Cretaceous assemblages; E-A zones, Laiming (1939), as emended by Almgren and others (1988) for Paleogene assemblages.…”

Section: Zonation and Agementioning

confidence: 99%

Volcanic rocks of the Santa Maria Province, California; Age and tectonic inferences from a condensed(?) succession of Upper Cretaceous, Paleocene, and Eocene strata, Big Pine Mountain area, Santa Barbara County, California

Keller¹

1998

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Benthonic Foraminiferal Zonation and Correlation of Late Cretaceous Strata in Great Valley of California: A Modification: ABSTRACT

Cited by 9 publications

References 0 publications

Subduction complex uplift and exhumation and its influence on Maastrichtian forearc stratigraphy in the Great Valley Basin, northern San Joaquin Valley, California

Subduction complex uplift and exhumation and its influence on Maastrichtian forearc stratigraphy in the Great Valley Basin, northern San Joaquin Valley, California

Facies architecture and provenance of a boulder-conglomerate submarine channel system, Panoche Formation, Great Valley Group: A forearc basin response to middle Cretaceous tectonism in the California convergent margin

Volcanic rocks of the Santa Maria Province, California; Age and tectonic inferences from a condensed(?) succession of Upper Cretaceous, Paleocene, and Eocene strata, Big Pine Mountain area, Santa Barbara County, California

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