Results 261 to 270 of about 14,281 (294)
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Environments of Limestone Deposition
SEPM Journal of Sedimentary Research, 1947ABSTRACT Limestones may be divided on the basis of their depositional environments into three categories: 1) platform, 2) basin, 3) geosynclinal. Platform limestones are thin, widespread, light colored, fossiliferous limestones which are often dolomitized.
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Carbonate Depositional Environments
2004Knowing where modern carbonates occur, what they are composed of, and what their controls are is essential for evaluating microfacies data. The objectives of this chapter are to summarize the settings and environments in which carbonate sediments are formed and to document which classifications are used for differentiating these environments.
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Magnetization of Sediments and Depositional Environment [PDF]
, 1989 Most records of claimed palaeomagnetic excursions are not accepted as manifestations of geomagnetic field variations, due to poor chronostratigraphic correlation. Post-depositional acquisition of detrital remanent magnetization may attenuate and modify, but not erase, high amplitude palaeomagnetic directions. It is proposed that the complete absence of
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Depositional Environments in Carbonate Rocks
1969Abstract One of the principal tasks of the geologist is to determine the depositional environments in which rocks are deposited. Although regional environmental interpretations of transgressions and regressions, movements of shoreline, and gross aspects of continental and marine sedimentation have been understood since stratigraphy ...
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Environments and processes of manganese deposition
Economic Geology, 1992Concentration of manganese in solution and its deposition takes place by redox-controlled processes in a variety of modern and ancient geologic and geochemical environments. Modern Mn deposition occurs predominantly in deep-sea areas rather than shallow-water domains.
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Contemporary Depositional Environments of the Omo Delta
Nature, 1970Geomorphological and sedimentological studies of depositional environments of the modern Omo River delta and floodplain are essential to an understanding of the Pliocene to Pleistocene Mursi, Nkalabong and Kibish Formations of the Lower Omo Basin (southwestern Ethiopia).
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Turbidite Depositional Environment In Deepwater Of Nigeria
Offshore Technology Conference, 2002Abstract Following the award of deepwater blocks by government in 1993, active exploration activities in Nigeria deepwater acreage, which is about 35, 000KM2 had been carried out between 800 and 2000m water depth in the Gulf of Guinea.
G.U. Agha +3 more
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Special Depositional Environments and Sediments
1992Sediments greenish in color are fairly common in the present-day oceans at various water depths. They are also frequently observed in ancient sediments, but in these cases the minerals causing the green color may differ from those found in young sediments due to diagenesis.
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THE DIPMETER USED TO RECOGNISE DEPOSITIONAL ENVIRONMENT
The APPEA Journal, 1974Historically the major application of dipmeters has been towards the derivation of dip in formations penetrated by the borehole. This preoccupation has led to the development of computer programmes which ignore characteristic qualities of the dipmeter data. By computing numerical values for the qualities of (a) Dip pattern, (b) Nature of stratification,
M. J. Gahan, C. Shields
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Coal Facies and Depositional Environment
1992In the preceding chapters coal components have been classified on the basis of physical, chemical and genetic relationships. In the following discussion these will be employed in a filtering process that is designed to detect the signatures left behind by depositional environments in the form of a distinctive coal facies.
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