Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 550 for “"Cretaceous"”.
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Cretaceous Nerineacean gastropods
… in tropical regions during the Jurassic and Cretaceous. The group first appears in the early Jurassic and high diversity levels had developed by late Jurassic and early Cretaceous times. A major extinction episode occurred during the latter part of the Cenomanian and the Turonian, with the …
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Late cretaceous (Maestrichtian) calcareous nannoplankton biogeography with emphasis on events immediately preceding the cretaceous/paleocene boundary
… in the marine photic zone during the latest Cretaceous. Different theories explaining the biospheric turnover at the Cretaceous/Paleocene (KIP) boundary have alternatively suggested or denied substantial environmental perturbations during the last ~500 ky of the Cretaceous. The purpose of …
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Late cretaceous (Maestrichtian) calcareous nannoplankton biogeography with emphasis on events immediately preceding the cretaceous/paleocene boundary
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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Early cretaceous belemnites from Southern India
The Cauvery Basin has been the subject of intense research into the bio- and lithostratigraphies of the basin fill since Blanford and Stoliczka (1861-65). The Karai Formation ranges from the Early Albian through to the late Turonian in age. The belemnites in this study were collected from the …
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Cretaceous-Tertiary boundary clays in central India
Not Available
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Mid Cretaceous fossil forests of Alexander Island, Antarctica
… soils in their original growth positions in mid Cretaceous rocks on Alexander Island, Antarctic Peninsula. These fossils indicate that diverse forest communities grew upon the floodplain areas of Alexander Island during the Albian at a palaeolatitude of 69-75 ° S. The fossil forests are preserved …
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Cretaceous and Paelogene Stratigraphy of Forrest County, Mississippi
… horizons. Detailed Stratigraphic descriptions of Cretaceous and Paleogene strata were compiled 30 well logs across five cross-sections. Subsidence and infilling of the East Mississippi Syncline and Perry Subbasin are constrained to the Late Trinitian to Early Washitan-Fredericksburgian (109-103 …
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Late cretaceous - early tertiary calcareous nannofossils from Australia
Title page, contents and abstract only. The complete thesis in print form is available from the University Library.
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Cretaceous bryozoan fossils from Needs Camp, South Africa
… bivalves etc. and date the deposits to the Late Cretaceous. Gaps in the fossil record hamper efforts to understand important geological events and palaeoenvironmental conditions. This study aims to examine and identify some bryozoans from the Needs Camp fossil deposits lodged in the marine …
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HlGH RESOLUTION PALAEOMAGNETIC ANALYSES OF CRETACEOUS SHALLOW WATER CARBONATES
… of 88 m of continuous borehole cores of Lower Cretaceous shallow water carbonates from Southern Italy was obtained and studied lithologically and palaeomagnetically. It was found that the rocks are organized in cyclic lithofacies representing depositional environments from subtidal to …
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Turonian (Late Cretaceous) Ostracoda from Dover, south-east England
… collected through the Turonian Stage of the Late Cretaceous from Dover, Kent, south-east England, consist of one hundred and three species group taxa. These are described and illustrated. This represents a significant increase in the knowledge of the Turonian fauna, since previous estimates of the …
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Oil Potential of Middle Cretaceous Tight Carbonate in Mexico
This thesis investigates a tight overpressured Cretaceous carbonate formation in Field A of Mexico. The Cretaceous carbonate was penetrated by well A1 and tested oil successfully during an open-hole test covering interval 5356 to 5515 m (MD) that produced oil of 33 degrees API. Initial pressure was …
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Paleocurrent Analysis of the Cretaceous Mitchell Formation, North-Central Oregon
<p>Cretaceous sedimentary rocks of north-central Oregon previously referred to as the Hudspeth and Gable Creek formations and recently renamed the Mitchell Formation are potential petroleum source and reservoir rocks. Thus, determining their extent under the cover of Tertiary volcanics is of great …
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Dinoflagellate biostratigraphy of the Cretaceous-Tertiary boundary, Round Bay, Maryland
… of the assemblage changes suddenly at the Cretaceous-Tertiary boundary with thirteen species making the~r first appearance at or just above the boundary. Nineteen species cross the boundary and thirty-five species are restricted to the Cretaceous. The rather sudden change in the nature of …
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Carbonate rock-water diagenesis lower cretaceous, Stuart City Trend, South Texas
The Stuart City Trend in south Texas is a Lower Cretaceous shelf-edge buildup of bioclastic and reefal carbonates. This carbonate system is currently buried to depths of between 3,300 and 5,000 meters. Combined with the equivalent updip shallow water, shelf carbonates of the Edwards and Glen Rose …
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