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Showing 1 to 18 of 18 for “"Biofacies"”.
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Modern Foraminiferal Bio-facies within a Transgressive Saline Influenced Deltaic Headland, South-Central Louisiana
… coastal regions refined marsh foraminiferal biofacies of the Mississippi delta region. Elevation, pore water salinity, total carbon, and mean grain size were compared with foraminiferal distributions in a transgressive marsh system of the lower Lafourche headland of the south-central delta …
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Distribution of Foraminifera and Pollen in Coastal Depositional Environments of the Southern Delmarva Peninsula, Virginia, U.S.A.
… of the 20 a priori subenvironments. Ten biofacies are defined by the distribution patterns of the dominant living species (>25% of the population); eight biofacies are defined by the distribution patterns of the dominant species (>25% of the assemblage) in total assemblages. Canonical …
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Micropalaeontology, Palaeoenvironments and Sequence Stratigraphy of the Sulaiy Formation of Eastern Saudi Arabia
… of Yamama formations in order to identify their biofacies. These microfossils include rotalid foraminifera, miliolid foraminifera, agglutinated foraminifera, calcareous algae, calcispheres, stromatoporoids, sponge spicules, problematica (e.g. Lithocodium aggregatum), molluscs, corals, echinoderms …
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The Palaeo-ecology and Biostratigraphy of the foraminifera from the Oxfordian of north Dorset
… technique. The sample groups are used to define biofacies, fifteen of which are recognised within the studied interval. The correlation of the four boreholes is achieved using lithological techniques, ammonite zonation, foraminiferal biohorizons and the biofacies defined by multivariate analysis. …
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Sediment Provenance of Tsunami Deposits: Implications for Assessing the Relative Intensity of Paleotsunamis from the Sendai Coastline of Japan
… 2011 Tohoku tsunami sediment within intertidal biofacies. By understanding the provenance of a known modern analogue, this technique may be useful to future studies that aim to investigate the relative intensity of tsunamis preserved in the geological record.</p>
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Assemblage Comparisons of Living Benthic Foraminifera at Bathyal Sites Oiled and Un-Oiled by the Deepwater Horizon Blowout in the Northeastern Gulf of Mexico
… that the surface assemblages are within a single biofacies except for two sites (GIP 21 and K). The assemblages from the heavily oiled and un-oiled cores were distinctly different. In 2010, the standing stock was nearly two times greater at the heavily oiled site, but the DOH was half the depth of …
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A shellabration of early life : exploring the taphonomy, diversity, and distribution of small shelly fossils surrounding archaeocyathid reef systems in the Harkless System, Death Valley, NV
… serves as a major control in determining SSF biofacies, with select fauna exhibiting evidence of additional taphonomic controls.
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The oligo-miocene sediments of the Maltese Islands
… each of the Formations a total of 15 biofacies are proposed on the basis of faunal variation. The probable depth ranges of each are used to refine conclusions drain from the sedimentological interpretations, in order that the palaeoenviromnents may be reconstructed. The study of a …
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BIOSTRATIGRAPHIC AND PALEOCEANOGRAPHIC RECONSTRUCTION OF THE LATE MIOCENE IN BAJA CALIFORNIA AND TRES MARIAS ISLANDS, MEXICO
… poor correlation with the cold water radiolarian biofacies of Weaver et al. (1981). A refinement of Casey's hypothetical ocean (Casey et al., 1982) and his biogeographic categories was utilized in the paleoceanographic interpretation herein. The quantitative analyses of the sections provided …
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Faunal, sedimentological and geochemical indicators of dysoxia in Cretaceous marine sediments
… proxies including macrofaunal properties, and biofacies models; - geochemical proxies, including trace-element abundances [Mo, V, Ni, Mn], element ratios and parameters [U/Th, authigenic U (U a ), V/Cr, Ni/Co, Ni/V, (Cu+Mo)/Zn, V/Sc and V/(V+Ni)] and Fe-S-C systematics [Total Organic Carbon …
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The Microbiostratigraphy of the Paiaeocene of the Northwest European Continental Shelf
… of the socalled "outer sublittoral" biofacies of King, 1983. Evidence for progressive deepening of water depth towards the north of the area and mto the Silver Pit Basin was noted. The microfaunal assemblages from the offshore boreholes are similar in overall character to microfaunas …
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Patch reefs off Bermuda
… a working model based on substrate control, biofacies development, particle breakdown, and sediment transport by wave action. Sediment composition provides the basis for recognition of the following microfacies: sediment pockets, sand channels, reef face channels, reef flank, interreef …
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Abyssal benthonic foraminifera and the carbonate saturation of sea water and a benthonic foraminferal carbonate saturation history for the Cape Verde Basin for the last 550,000 years
… is reinterpreted here to be the undersaturation biofacies at the Rio Grande Rise in the southwestern Atlantic (Lohmann, 1978) and in the southeastern Indian Ocean (Corliss, 1979). In both the southeastern Indian Ocean an in the Cape Verde Basin, the greatest increase in undersaturation occurs …
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Conodont biostratigraphy of the Bakken and lower Lodgepole Formations (Devonian and Mississippian), Williston Basin, North Dakota
… the presence of the palmatolepid-polygnathid biofacies indicative of an outer shelf environment.</p> <p>Siphonodella sulcata, from the upper member of the Bakken, suggests that this member may be as old as earliest Kinderhookian, but because of its association in lag zones with conodonts …
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Responses of a shallow-water ecosystem to the early Paleogene greenhouse environmental conditions : evolution of Larger Foraminifera and coral communities from the Northern Tethys
… not forming extensive reefs, are common in the biofacies as small isolated colonies, piles of rubble or small patch-reefs. These corals might have developed ‘alternative’ life strategies to cope with harsh conditions (high/fluctuating nutrients/turbidity, extreme temperatures, perturbation of …
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Morphological diversification of the ptychopariid trilobites in the Marjumiid biomere (Middle to Upper Cambrian)
… American Craton and not the result of shifting biofacies or the migration of taxa from outside North America. The morphological diversification of ptychoparids in the Marjumiid Biomere is composed of two distinct phases. The morphological expansion of the Superfamily Ptychopariacea (the …
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Analysis of the central Hawke's Bay sector of the Late Neogene forearc basin, Hikurangi margin, New Zealand
… abundance. In addition, thirty molluscan biofacies associations and sub-associations have been identified, representing both in situ and transported assemblages, and paleoenvironments ranging from estuarine to outer shelf settings. Vail-type sequences, typically 20-80 m thick, are best …