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Showing 1 to 20 of 31 for “"Albian"”.
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Albian microbiostratigraphy (foraminifera and Ostracoda) of S.E. England and adjacent areas
… microfauna (foraminifera and Ostracoda) of the Albian Stage has been thoroughly documented by previous authors and many zonal schemes have been proposed. While these schemes have been defined on very thorough research, the majority have been defined on one fossil group, and occasionally on one …
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Foraminiferal biostratigraphy and palaeoecology of the Albian to Santonian (Cretaceous) of Bornholm, Denmark
… herein. These formations range in age from Early Albian to Middle Santonian. The succession contains major breaks in deposition. A new foraminiferal biozonal scheme is presented, comprising six local assemblage biozones. These are compared to foraminiferal zonal schemes proposed for other areas of …
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Palynostratigraphy of Uppermost Albian to basal Coniacian (Cretaceous) sediments from the Western Anglo-Paris Basin
The distribution of dinoflagellate cysts in sediments of the mid Cretaceous from the western Anglo-Paris Basin are examined. Samples were collated from a range of facies types (i.e. basin margin-central basin), but particular emphasis was placed on those which represented deposition around the …
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Paleoenvironmental reconstruction based on palynological and palynofacies analyses of the Aptian-Albian succession in the Sergipe Basin, northeastern Brazil
… the paleoenvironments of the upper Aptian-middle Albian interval. Altogether 19 species of spores, 31 species of pollen grains, 20 species of dinocysts were identified. Moreover, one genus of Acritarcha and one genus of fresh-water algae were recorded. The sections are clearly dominated by the …
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Quantitative palynological analyses of Albian-Cenomanian (Lower to Upper Cretaceous) strata in the Sverdrup Basin: Insights into paleoecology, paleoclimatology and palynostratigraphy
… analyses of terrestrial palynomorphs from Albian to Cenomanian (Lower to Upper Cretaceous), Sverdrup Basin strata reveal a landscape with wet lowlands inhabited by Pteridophytina and Bryophyta, with cooler, moist uplands inhabited by a variety of conifer plants. A humid and temperate …
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Identification of the physical controls on the deposition of Aptian and Albian deep water sands in the Bredasdorp Basin, South Africa
… on the deposition of the 13A (Aptian) and 14A (Albian) sequence sands within the deep water region of the Central Bredasdorp Basin through identifying the mass transport facies and processes and relating these to tectono-eustatic factors. Since a primarily seismic-based approach was used to …
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The Aptian-Albian ironstone of the Rapid Creek formation, Little Fish Creek, NWT: implications for Cretaceous Ocean Anoxic Events and critical mineral deposits
The Aptian-Albian Rapid Creek formation is a phosphatic ironstone located in the northern Yukon and Northwest Territories in the Richardson Mountains. Ironstones are Phanerozoic, Fe-rich, marine chemical sedimentary rocks. Metalliferous sediment accumulation occurred in a region of the Sevier …
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Stable isotope paleohydrology of pedogenic carbonates in the Wayan Formation (Albian) from the wedge-top depozone in the North American Cretaceous Western Interior Basin
… constrain the oxygen isotope mass balance of the Albian hydrologic cycle. At mid-latitudes (40-50°N paleolatitude), sideritic paleosols predominate, indicating paleoenvironments with positive precipitation – evaporation (P-E) balances, local exceptions with negative P-E balances occur on the …
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Early cretaceous belemnites from Southern India
… The Karai Formation ranges from the Early Albian through to the late Turonian in age. The belemnites in this study were collected from the sediments of Albian age. Over 3500 belemnites were collected of which, 2 families and three genera were identified. The belemnite fauna is rich and …
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Tectono-stratigraphic evolution of the offshore Benin Basin, SW Nigeria
… probably occurred from late Aptian/early Albian to Cenozoic, with the Cretaceous events studied in detail in this thesis. The localised late Aptian/early Albian deformation is restricted to the northern half-graben, and immediately postdates the syn-rift phase. The late Aptian/early Albian …
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Carbonate Carbon Isotope Chemostratigraphy from the Ruby Ranch Member of the Cedar Mountain Formation in the Western San Rafael Swell
… and has been determined to span the Aptian-Albian Boundary based on chemostratigraphic and detrital zircon studies. The study location presented here, Moore CutoffRoad, is further west than previous studies, and thought to be a more expanded section that may contribute more detail to the …
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The sedimentology, palaeoecology and stratigraphy of cretaceous rocks in N.W. Scotland
… cysts and foraminifera) indicates a latest-Albian to IVlid-Cenomanian age for the Morvern Greensand Formation; a Late Cenomanian age for the Gribun Chalk Formation, and an Early - IVliddle Turonian age for the Str2thaird Limestone Formation. The most refined biostratigraphical range for the …
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Depositional history, environments of deposition, and hydrocarbon potential of the Newcastle Formation (Lower Cretaceous) of eastern North Dakota
<p>The Newcastle Formation (Albian) in North Dakota is composed primarily of fine grained sandstone, mudstone and shale. This study examined the Newcastle within the eastern two thirds of North Dakota, with the goal of determining the various depositional environments, the depositional history, and …
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The Middle to Late Cretaceous microbiostratigraphy (foraminifera) and lithostratigraphy of the Cauvery Basin, Southeast India
… The study records two levels, ( I ) in the late Albian and (2) from the late Cenomanian to mid-Turonian, when anoxic conditions developed in the Basin. These anoxic events record major taxonomic changes in the planktonic foraminiferal assemblage. The study shows that the anoxic events had a major …
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Estratigrafia de sequências do intervalo aptiano ao albiano na Bacia do Araripe, NE do Brasil
… a detailed stratigraphic analysis of the Aptian-Albian interval in the east part of Araripe Basin, NE of Brazil which correspond, litostratigraphically, to Rio Da Batateira, Crato, Ipubi and Romualdo formations. The stratigraphic analysis was based on three different stages, the 1D, 2D and 3D …
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Structure and stratigraphy of the Antelope Mountain Quartzite, Klamath Mountains, Northern California
… beds. These later normal faults cut Middle Albian conglomerate in the southern part of the field area, and are overlapped by Coniacian to Maastrichtian sandstone of the Hornbrook Formation, thus tightly bracketing deformation to the mid- to Late Cretaceous. This deformation provides an …
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Geochemical Approaches to Paleobiology, Paleoclimatology, and Chronostratigraphy of the Cretaceous Cloverly Formation
… of the Cloverly is constrained to mid-late Albian in age, warranting revision of paleoecological comparisons with other late-Early Cretaceous nonmarine deposits. I examine the ecohydrology and paleoenvironment of a local Cloverly fossil assemblage by analyzing the 18O of biogenic phosphates …
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A seismic stratigraphic analysis and petroleum system characterization of the cretaceous sequence in central Walvis basin, offshore Namibia
… in the study area. Additionally, marine Aptian/Albian oil-prone source rocks were identified by prominent distinct parallel high-amplitude horizons which can also serve as a seal rock. Potential Reservoir rocks were identified in Cenomanian and Santonian levels and at Upper …
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Stratigraphic and Geochemical Expression of Early Cretaceous Environmental Change in Arctic Svalbard
… and chemo- stratigraphic study of Berriasian–Albian strata from the Central Basin of Svalbard. The “outsized clasts” recorded on Spitsbergen do not show evidence that they were rafted by glacial ice (e.g. surface striations), although could have been rafted by seasonal sea-ice. The results …
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Palinoestratigrafia e paleoecologia da sequência lacustre do cretáceo inferior, em Serra Negra - PE, Bacia Sedimentar do Jatobá, NE do Brasil
… (1981), atualmente denominada Província a “Pre-Albian Early Cretaceous Dicheiropollis etruscus/Afropollis” de Herngreen et al. (1996).
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