Syn‐sedimentary Marine Lithification of Middle Jurassic Limestones in the Paris Basin

Purser, B. H.

doi:10.1111/j.1365-3091.1969.tb00875.x

Cited by 137 publications

(50 citation statements)

References 12 publications

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“…Intensity and type of bioturbation below and above the surface, as well as signs of encrusting and boring organisms at the surface, are used as characterization criteria. Lithification of the discontinuity surface is indicated by an omission suite including boring organisms that cut sharply through the fabric of the underlying rock (Purser 1969;Shinn 1970;Ghibaudo et al 1996). Lithification of the discontinuity surface is indicated by an omission suite including boring organisms that cut sharply through the fabric of the underlying rock (Purser 1969;Shinn 1970;Ghibaudo et al 1996).…”

Section: Biological Activitymentioning

confidence: 99%

Discontinuity surfaces on a shallow-marine carbonate platform (Berriasian, Valanginian, France and Switzerland)

Hillgaertner¹

1998

Journal of Sedimentary Research

104

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Discontinuities in sedimentation are commonly expressed as surfaces in outcrop sections and are due to rapid and substantial environmental changes. On shallow-marine carbonate platforms most such surfaces represent hiatuses below biostratigraphic resolution, and detailed analysis is necessary to identify and evaluate the environmental change involved. Surfaces in nine sections of the Lower Cretaceous of the French and Swiss Jura platform are characterized on the basis of eight universally applicable criteria (geometry, lateral extent, morphology, biological activity, mineralization, facies contrast, diagenetic contrast, and biostratigraphy). Nine different surface types are distinguished by their common features and environment of formation. All of them are related to environmental changes in the form of subaqueous erosion, subaerial exposure, subaqueous omission, or changes in texture and facies. The distribution of surface types in the studied sections shows that condensation and exposure-related surfaces tend to occur repetitively in certain intervals. Calibrated by biostratigraphy, these surface zones can be correlated across the platform from proximal to distal positions. In comparison with the global sequence-stratigraphic framework (Hardenbol et al. 1997) most exposure zones correlate with third-order sequence boundaries; condensation zones fall in between. In the studied sections, third-order eustatic sea-level drops appear to be represented rather by zones of small-scale discontinuities than by widespread and well-marked single sequence boundaries. This is explained by the superposition of high-frequency, low-amplitude sealevel fluctuations on a larger-scale sea-level trend under greenhouse conditions. The lateral extent of the surface zones varies through time and indicates important changes in platform morphology. Changes in local subsidence rate indicated by variable thicknesses of the deposits in comparison with second-and third-order sea-level trends suggest an evolution of the French Jura platform from a ramp-type morphology in the late Middle Berriasian to a flat-topped platform in the Late Berriasian. The Early Valanginian again is characterized by increased differential subsidence and well-marked platform morphology.This study demonstrates that:(1) small-scale and short-lived discontinuities can reflect large-scale variations of relative sea level;(2) on shallow platforms characterized by small topographic variations and lateral facies changes, third-order sequence-stratigraphic surfaces are not necessarily expressed by one widespread single surface, but by zones of surfaces indicating repeated environmental changes; surface zones can serve as an additional tool for correlation and interpretation of platform evolution; and(3) small-scale discontinuities form an integral part of the stratigraphic record and should receive the same attention as the sedimentary deposits they delimit.

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Section: Biological Activitymentioning

confidence: 99%

Discontinuity surfaces on a shallow-marine carbonate platform (Berriasian, Valanginian, France and Switzerland)

Hillgaertner¹

1998

Journal of Sedimentary Research

104

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“…(i) a dissymmetric or microstalactitic (Taylor & Illing, 1969;Purser, 1969), gravitational (Muller, 1971) or pendant Longman, 1980) type forming when water is present as droplets on the underside of grains ( Fig. 16).…”

Section: B) Cementsmentioning

confidence: 99%

“…Cements tend to be fibrous or micritic (Purser, 1969(Purser, , 1980Schroeder, 1973;Bathurst, 1974;Moore, 1977;Hanor, 1978;Montaggioni, 1978). Cements tend to be fibrous or micritic (Purser, 1969(Purser, , 1980Schroeder, 1973;Bathurst, 1974;Moore, 1977;Hanor, 1978;Montaggioni, 1978).…”

Section: B) Cementsmentioning

confidence: 99%

“…Finally, one of the best recorders of vadose environment is microstalactitic cement which is easily recognizable in ancient rocks, because of its distinct morphology and texture (Purser, 1969). Fossil meniscus cement is easier to recognize when not obscured by later cementation, but is frequently observed in Quaternary carbonate rocks (Schroeder, 1973).…”

Section: B) Cementsmentioning

confidence: 99%

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Sea-Level Research

Plassche¹

1986

114

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“…Superficially similar stacking of cemented and uncemented limestones may also result from intermittent lithification at or near the sediment sea water interface penecontemporaneous with deposition (Purser, 1969;Shinn, 1969;Rose, 1970;Macintyre, 1977). The origin of an impermeable layer of limestone is of importance in interpretation of both depositional history and diagenetic environments.…”

Section: Introductionmentioning

confidence: 99%

Origin of Discontinuity Surfaces in Limestones: Isotopic and Petrographic Data, Pleistocene of Barbados, West Indies

Videtich

Matthews

1980

SEPM JSR

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ABsrg^cr: In order to compare the validity of petrographic and isotopic techniques in determining the depositional and diagenetic history of limestones, both techniques were used on samples from a Pleistocene outcrop on Barbados, where depositional and diagenetic models are relatively simple and have well-documented recent analogues. The outcrop consists of a reasonably homogeneous grainstone cut by a discontinuity surface. The carbonate immediately above and below the discontinuity forms well-cemented layers, but the rest of the grainstone is highly permeable. Only the lower well-cemented layer contains isopachous, bladed cement. Carbon of this layer is isotopically light, and oxygen is slightly heavy. In addition, ~ ~80 distinctly changes across the discontinuity.Based on the cement morphology, the lower cemented layer formed as a submarine hardground; however, the isotopic analyses indicate evaporative precipitation of calcite at a subaerial exposure at or just above the submarine hardground following a regression. This regression and following transgression formed the discontinuity. The distinct offset of 8t80 values across the discontinuity indicates that the limestone above and below the discontinuity underwent mineralogical stabilization in solutions of different isotopic compositions. Diagenesis of the unit below the discontinuity preceded deposition of the unit above. The upper cemented layer resulted from cementation in a perched phreatic environment resting on the discontinuity.We consider these results to be generally apphcable to other hmestones. Stratigraphic variation in ~ tSO is especially useful in identifying discontinuity surfaces and in mapping individual depositional/diagenetic packages within otherwise similar limestones. Integration of petrographic and isotopic data is necessary to determine the origin of discontinuity surfaces.

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Syn‐sedimentary Marine Lithification of Middle Jurassic Limestones in the Paris Basin

Cited by 137 publications

References 12 publications

Discontinuity surfaces on a shallow-marine carbonate platform (Berriasian, Valanginian, France and Switzerland)

Discontinuity surfaces on a shallow-marine carbonate platform (Berriasian, Valanginian, France and Switzerland)

Sea-Level Research

Origin of Discontinuity Surfaces in Limestones: Isotopic and Petrographic Data, Pleistocene of Barbados, West Indies

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