Geology and paleontology of the Santa Maria district, California

Woodring, W. P.; Bramlette, M. N.

doi:10.3133/pp222

Cited by 101 publications

(278 citation statements)

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“…The Monterey Formation consists of massive to well-laminated biosiliceous rocks, dolomite, and minor bathyal sandstone. The middle Miocene to Pliocene Sisquoc Formation conformably and locally unconformably overlies the Monterey Formation (Woodring and Bramlette, 1950). The Sisquoc Formation is composed of massive to weakly laminated biosiliceous rocks, siltstone, and bathyal sandstone.…”

Section: Santa Maria Basin Lithostratigraphymentioning

confidence: 96%

“…In early Miocene time, extension and rapid subsidence occurred in the Sur, Santa Lucia, Santa Maria, and Pismo-Huasna basins (McCulloch, 1987;Tennyson, 1989;Tennyson and others, 1991). The Santa Maria basin (for the purposes of this report, "Santa Maria basin" will denote both the offshore and onshore components of the basin) contains as much as 4.5 km of Miocene and younger strata (Woodring and Bramlette, 1950) on top of Point Sal ophiolite, Franciscan Complex, and Great Valley sequence basement rocks (McLean, 1991). Basin fill includes late early Miocene (18-16 Ma) bimodal volcanic rocks (Canfield, 1939;Dibblee, 1950Dibblee, , 1966Woodring and Bramlette, 1950;McLean, 1991) with oceanic-ridge affinities (Cole and Basu, 1992).…”

Section: The Southern Coast Rangesmentioning

confidence: 99%

“…Basin fill includes late early Miocene (18-16 Ma) bimodal volcanic rocks (Canfield, 1939;Dibblee, 1950Dibblee, , 1966Woodring and Bramlette, 1950;McLean, 1991) with oceanic-ridge affinities (Cole and Basu, 1992). Woodring and Bramlette, 1950;Stanley and others, 1991).…”

Section: The Southern Coast Rangesmentioning

confidence: 99%

“…In the onshore part of Santa Maria basin, significant folding and reverse faulting began in Pliocene time (about 4 to 2 Ma) and has continued into the Quaternary (Woodring and Bramlette, 1950;Namson and Davis, 1990). In offshore Santa Maria basin, the main period of folding and reverse faulting occurred in the early Pliocene (5.3-3.4 Ma) and continued with decreased intensity into the late Pliocene and Quaternary (Crouch and others, 1984;Clark and others, 1991;Miller and others, 1992).…”

Section: Style Timing and Magnitude Of Late Cenozoic Tectonismmentioning

confidence: 99%

“…Woodring and Bramlette (1950) recognized both a finegrained basin facies and a marginal sandstone facies in the Sisquoc Formation, and they stated that within the Santa Maria basin as much as 1,524 m (5,000 ft) of rocks assignable to the formation are exposed. The soft diatomaceous and hard porcellaneous strata of the basin facies of the Sisquoc may seem indistinguishable from those of the underlying Monterey Formation; however, massive diatomaceous mudstone is more prevalent in the Sisquoc Formation, and the two formations are often separated by an unconformity in the Santa Maria basin (Woodring and Bramlette, 1950).…”

Section: Study Of the Miocene-pliocene Boundary Interval In Californiamentioning

confidence: 99%

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Neogene geohistory analysis of Santa Maria Basin, California, and its relationship to transfer of Central California to the Pacific Plate. Diatom biochronology of the Sisquoc Formation in the Santa Maria Basin, California, and its paleoceanographic and tectonic implications

McCrory¹,

Wilson²,

Ingle³

et al. 1995

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Section: Santa Maria Basin Lithostratigraphymentioning

confidence: 96%

Section: The Southern Coast Rangesmentioning

confidence: 99%

Section: The Southern Coast Rangesmentioning

confidence: 99%

Section: Style Timing and Magnitude Of Late Cenozoic Tectonismmentioning

confidence: 99%

Section: Study Of the Miocene-pliocene Boundary Interval In Californiamentioning

confidence: 99%

See 3 more Smart Citations

Neogene geohistory analysis of Santa Maria Basin, California, and its relationship to transfer of Central California to the Pacific Plate. Diatom biochronology of the Sisquoc Formation in the Santa Maria Basin, California, and its paleoceanographic and tectonic implications

McCrory¹,

Wilson²,

Ingle³

et al. 1995

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Diatomeen aus dem Eozän Norddeutschlands

Benda

1965

Paläontol. Z.

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Geomorphic and pedogenic evolution in coastal sediments, central California

Moody

Graham

1995

Geoderma

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Studies of soil chronosequences on marine terraces facilitate the use of terraces for tectonic and paleoclimatic interpretation. However, many areas on the California coast have received substantial eolian deposits after pedogenesis began, so do not qualify as chronosequences. These areas are worthy of study because they are widespread coastal landscape features, and they enable us to interpret pedogenic and geomorphic processes in sandy regolith. The objective of this study was to use soil and deep regolith morphology and chemistry to interpret pedogenic and geomorphic evolution on a sequence of four marine terraces, San Luis Obispo County, California. The terraces are numbered I, 2, 3, and 4, from oldest to youngest. The eroded terrace platforms have been tentatively dated at 560, 420 or 480, 320, and 120 ka, respectively. The sand deposits on each platform may be considerably younger. The amount of land surface dissection and the depth of stream incision increase with increasing terrace age and elevation. Morphological features suggest that the soils (Xeropsamments on Terrace 4, Haploxerolls on Terrace 3) on the two youngest terraces are well drained, and their morphological development is typical of soils in eolian sand deposits. Morphological and chemical features of the basal regolith contrast with those of the soils. Clay, Fe oxides, and opaline silica were deposited by groundwater flow above the bedrock platform. Above the shoreline angle, where the deep regolith receives additional groundwater from higher terraces, redoximorphic features have developed. Gray mottles are larger, more common, and more distinct in the basal regolith of progres sively older terraces. Erosion has removed much of the overburden on Terraces 2 and I, and soils (Epiaquolls on Terrace 2, Epiaqualfs on Terrace I) have developed in what was once deep regolith. The landscape, soils, and deep regolith show an evolution of processes, whereby the path and direction of water movement through the regolith is controlled first by terrace morphology and stratigraphy, then by the development of pedogenic features in the soil and deep regolith, and by terrace dissection.

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Geology and paleontology of the Santa Maria district, California

Cited by 101 publications

References 0 publications

Neogene geohistory analysis of Santa Maria Basin, California, and its relationship to transfer of Central California to the Pacific Plate. Diatom biochronology of the Sisquoc Formation in the Santa Maria Basin, California, and its paleoceanographic and tectonic implications

Neogene geohistory analysis of Santa Maria Basin, California, and its relationship to transfer of Central California to the Pacific Plate. Diatom biochronology of the Sisquoc Formation in the Santa Maria Basin, California, and its paleoceanographic and tectonic implications

Diatomeen aus dem Eozän Norddeutschlands

Geomorphic and pedogenic evolution in coastal sediments, central California

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