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Showing 1 to 20 of 30 for “"Upper Jurassic"”.
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Middle and Upper Jurassic bivalves from the Iberian Range (Spain)
Previous work on Jurassic bivalves from the Iberian Range is reviewed, whereby emphasis is placed on Callovian-Kimmeridgian species. The taxonomy, distribution pattern and ecology of the bivalve fauna occurring in Middle and Upper Jurassic rocks of the Aragonian Branch of the Iberian Range have …
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The sedimentology and lithostratigraphy of the Upper Jurassic Lourinha formation, Lusitanian Basin, Portugal
… the Triassic.<br></br><br></br>During the Late Jurassic rifting phase in the development of the Lusitanian Basin marine shelf and slope systems were replaced by alluvial fan and fluvial environments which prograded from the nonh during the late Kimmeridgian. Continental environments, …
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Upper Jurassic (Oxfordian) Smackover facies characterization at Little Cedar Creek Field, Conecuh County, Alabama
The Upper Jurassic (Oxfordian) Smackover Formation is a shallow-marine carbonate unit in the subsurface of the U.S. Gulf Coast, spanning from south Texas to west Florida. This field case-study focuses on Little Cedar Creek Field located in southeastern Conecuh County, Alabama. The objectives of …
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A palynological investigation of Upper Jurassic basal Cretaceous sediments from England, France and Iberia
… incorporates 52 selected "key-species" for the Upper Oxfordian - Berriasian interval. Earlier studies concerning Upper Jurassic and Lower Cretaceous microplankton are reviewed in light of the present study. Although the above biostratigraphic units are mainly of local stratigraphic value only, …
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Controls on Carbonate Factory Distribution in a Restricted Intraplatform Basin: Upper Jurassic Smackover, Southwest Alabama
… the stratigraphy and depositional facies of the Upper Jurassic Smackover Formation in the Manila Basin, southwest Alabama, and examines the carbonate factories responsible for sediment production. Four wells with associated cores and log data were analyzed, alongside geochemical proxy …
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Middle and upper jurassic foraminifera and radiolaria of Scotland : an integrated biostratigraphical and palaeoenvironmental approach
… distribution from all the major Middle and Upper Jurassic marine deposits of Scotland. These sampled sites are divided between two basins with Staffin Bay and Bearreraig Bay within the Inner Hebrides Basin, North West Scotland; and Brora, Balintore, Helmsdale and Eathie Haven representing …
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Biostratigraphy, lithostratigraphy, ammonite taxonomy and microfacies analysis of the Middle and Upper Jurassic of northeastern Iran
The Middle and Upper Jurassic sedimentary successions of Alborz in northern Iran and Koppeh Dagh in northeastern Iran comprise four formations; Dalichai, Lar (Alborz) and Chaman Bid, Mozduran (Koppeh Dagh). In this thesis, the biostratigraphy, lithostratigraphy, microfacies, depositional …
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Depositional environments of the Salt Wash sandstones (Upper Jurassic) in portions of Rio Blanco and Moffat counties, Colorado
Includes bibliographical references (pages 72-76).
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Controls on the geometry, stratigraphic distribution and quality of coals of Middle to Upper Jurassic strata in eastern Australia
The Middle to Upper Jurassic Walloon Coal Measures of eastern Australia host petroleum resources mostly in the form of coal bed methane. The coals accumulated at a high-latitude (>75°S) during a greenhouse epoch and occur in regionally extensive fluviolacustrine successions. Previous studies have …
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No Triassic structural control of the development of the Middle Ground Arch, Eastern Gulf of Mexico
… of Mexico before and during deposition of the Upper Jurassic Norphlet, Smackover, and Haynesville Formations is important because these formations have hydrocarbon potential and determining the distribution may help us predict the location of these hydrocarbons. Strictly regulated lease sales …
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The Palaeo-ecology and Biostratigraphy of the foraminifera from the Oxfordian of north Dorset
… The long ranging nature of the majority of Upper Jurassic foraminifera precludes the definition of a rigorous biostratigraphic zonation. The important biostratigraphic species for the Upper Jurassic are recorded however, and a tentative zonation, based on the concept of interval zones …
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Analysis of the Upper Cotton Valley Group in the Northeastern Mississippi Interior Salt Basin
… Gulf of Mexico. The Cotton Valley Group is an Upper Jurassic – Lower Cretaceous subsurface siliciclastic unit that has been studied extensively in the MISB for the last several decades because of its high potential as a reservoir rock. This study focuses on the Shuler Formation in the Upper …
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FORAMINIFERAL DISTRIBUTION AND SEQUENCE STRATIGRAPHY OF OXFORDIAN SUCCESSIONS IN THE WESSEX/ANGLO-PARIS BASIN
… A micropalaeontology study of two Upper Jurassic, Oxfordian successions from the South . Dorset Coast, U.K. and the Normandy Coast, France provide the basis for this study. A near continuous succession of the Oxfordian from South Dorset and Normandy were obtained, and foraminifera …
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Kimmeridgian and Volgian fault-margin sedimentation in the Northern North Sea area
The Upper Jurassic sediments of the East Coast of Sutherland and the South Brae Oilfield were deposited during the late Jurassic taphrogenic episode in which there was rapid subsidence in the grabens and uplift of the adjacent areas. The initiation of coarse-grained sedimentation in the grabens was …
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Detailed studies of the Callovian and Oxfordian microplankton from the Warboys and Warlingham boreholes
… from the Kellaways Beds and Oxford Clay (Upper Jurassic) of the Warboys and Warlingham Boreholes, based on 118 samples. Chapter one sets out the aim of the study as being (i) to evaluate the significance of microplankton assemblages in biostratigraphic correlation, (ii) establish a …
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The sedimentology and petrology of the new red sandstone of the Elgin Basin, North East Scotland
… the basin at Elgin, deposition began during the Upper Permian with a series of sheetflood deposits which graded laterally into seif dunes to the north. Deposition during the Triassic is dominated by aeolian barchan dunes although minor point bar, playa and floodplain deposits were' present. A …
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Disease in the Cretaceous: a comparative study of Iguanodon and hadrosaur palaeopathology
… is expanded with a wide range of taxa, from Upper Jurassic specimens such as Camptosaurus and Dryosaurus, to Iguanodon and Late Cretaceous hadrosaurids, the latter showing the highest frequency of palaeopathologies. Statistical analysis of selected museum collections demonstrates a …
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Controls on Stratigraphy and Architecture of Shallow-Water Deltas: Examples from the Early Cretaceous of Central-Eastern Spain
… rift sub-basin during a rifting cycle from the Upper Jurassic to Middle Cretaceous. The succession displays two regressive phases of shallow-water river-dominated deltas that prograded into a carbonate-dominated shelf during an overall longer term transgression. This project uses a combination …
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Carbonate Bodies Within the Basal Swift Formation (Jurassic) of Northwestern North Dakota
… carbonate bodies of the basal Swift Formation (Upper Jurassic) occur as anomalous deflections on a relatively uniform mechanical well log section. The areal distribution, stratigraphic relationships, and genesis of the carbonate bodies were determined by using the gamma ray log, the …
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