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Showing 1 to 20 of 24 for “"marls"”.
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Palynological investigations of Cenomanian chalks and marls from England
The palynological analysis of chalk and marl samples from Cenomanian sections sampled at high resolution has yielded largely diverse and abundant, well-preserved microplankton assemblages. Four sections have been investigated, three from the Dover-Folkestone Warren area, south-east England and the …
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Biostratigraphy and palaeolimnology of late-glacial and holocene lake marls at Quidenham Mere, Norfolk.
… sedimentary infill is composed largely of lake marls. These contain abundant molluscs and ostracods, as well as beautifully preserved pollen, covering most of the Late-glacial and Holocene. At Quidenham Mere, substantial thicknesses of sediment ( c.12 m) have accumulated relatively rapidly (at …
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ΤΕΧΝΙΚΟΓΕΩΛΟΓΙΚΟΙ ΧΑΡΑΚΤΗΡΕΣ ΤΩΝ ΜΑΡΓΩΝ ΗΡΑΚΛΕΙΟΥ ΚΡΗΤΗΣ
IN THIS THESIS, IRAKLION MARLS WHICH CONSTITUTE THE MAIN GEOLOGICAL FORMATION OF THEIR GEOLOGICAL ENVIROMENT IS DESCRIBED AND THEIR MINERALOGICAL COMPOSITION AND FABIRC ARE DETERMINED. FOR THE GEOTECHNICAL DESCRIPTION AND CLASSIFICATION OF THESE MARLS PARTICLE SIZE DISTRIBUTION AND PLASTICITY ARE …
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The petrology of clay-rich beds in the Turonian (Upper Cretaceous) of the Anglo-Paris Basin
… large influx of non-carbonate material. Flaser marls may have been formed from either a localised decrease in the amount of noncarbonate materiel deposited, or the deposition of several smaller pulses of non-carbonate material interspersed with white chalk sedimentation. Mineralogical …
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Diagenesis of the B chalk, B marl, and Fort Hays member of the Niobrara Formation, Denver Basin, Colorado
… δ18O values than were seen in the chalks and marls. Evidence for early diagenesis was also present in the cathodoluminescence portion of the study, where the Fort Hays was brightly luminescent in comparison to the chalks and marls, and elemental data showed high concentrations of Mn2+ (700+ …
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Structural and stratigraphic relationships between the Numidien formation and underlying formations in the westernmost Mogod Mountains, northern Tunisia
… of Upper Cretaceous to Eocene limestones and marls which exhibit a shallowing event beginning prior to the lowermost Eocene. Water depths of deposition based on faunal assemblages indicate that the Upper Cretaceous limestones and marls were deposited in water depths greater than 1 meters. …
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Mechanical stratigraphy and sonic log relationships using the Proceq Bambino in the Niobrara Formation, Denver Basin
… relationship was typically higher in chalks than marls, and x-ray fluorescence and x-ray diffraction data from one core shows that higher clay content heavily influences sonic log response within marls. Sonic log data in the study area has also been related to initial and first year hydrocarbon …
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Preliminary report on the geology of Colgrove Butte, Hettinger County, North Dakota
… age, containing beds of hard limestone, marls, argillaceous limestones, calcareous clays, clays and sands. It is everywhere covered by a mantle of top soil 6 inches to 3 feet 6 inches thick. Below this topsoil, extending over approximately two-thirds of the caprock area of the butte, is a …
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Faults and fractures in the Niobrara Formation of Wattenberg field, Colorado
… that faults are present in both the chalks and marls lends credence to the potential that seismic data may be able to predict fracture zones either directly or indirectly. The hypothesis is tested on a 50 square mile 3D seismic survey. Generally, faults present in the Niobrara Formation in the …
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Stroncio nustatymas vaistažolėse liepsnos atominės absorbcinės spektrometrijos metodu /
… carbonate. Strontium can also occur in shales, marls and sandstones. The aim - to explore and optimize the basic conditions for the determination of strontium and prepare the methodic for the determination of strontium in herbs by flame atomic absorbtion spectrometry. A method for the …
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Geohistory of the Central Anatolian Plateau southern margin (southern Turkey)
… of almost 1500 km3 of conglomerates and marls. Our provenance analysis of the conglomerates reveals that most of the sediment is derived from and north of the SE margin of the Central Anatolian Plateau. A comparison of these results with the composition of recent conglomerates and the …
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Turonian (Late Cretaceous) Ostracoda from Dover, south-east England
… solvent method is shown to be preferable for marls. Nineteen species and six subspecies are here described as new: Polycope lunaplena sp. nov, Cytherella truncatoides sp. nov., Cytherella vulna sp. nov., Cytherella weaveri sp. nov., Cytherelloidea granulosa parca ssp. nov., Cardobairdia …
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The tertiary geology and systematic paleontology (phylum mollusca) of the Guajira Peninsula, Colombia, South America
… of the marine invasion. A sequence of chalky marls exposed in the Portete Basin is the newly defined Peerpana Member of the Uitpa Formation. The Jimol Formation, exposed in the Cocinetas Basin, is composed of beds of sandstone and sandy limestone, and indicates an early Middle Miocene …
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High-Resolution Sequence Stratigraphy of Paleogene, Nontropical Mixed Carbonate/Siliciclastic Shelf Sediments, North Carolina Coastal Plain, U. S. A.
… and fine skeletal wackestones and planktonic marls (slightly storm-winnowed to sub-wave base, deeper shelf). Paleogene deposition on this high-energy, open-shelf was characterized by a distinctive shelf profile of inner shelf and inner shelf break, deep shelf and continental shelf/slope break. …
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Speleogenesis in Comal County, Texas
… of these layers in contrast to the shales, marls, and dolomites composing the major part of the section. Secondary collapse of the overlying less soluble strata may provide access for additional inflow, but in most cases this can be eliminated as the primary cause of cavern development. …
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Geological and Geochemical Investigation of the Petroleum Systems of the Permian Basin of West Texas and Southeast New Mexico
… Shale, the Wolfcamp Shale, and the Bone Spring Marls. The Spraberry source rock is mostly immature with respect to petroleum generation. Geochemical evidence strongly suggests source-rock deposition under suboxic and anoxic-suboxic conditions for all but the Bone Spring and Simpson source beds, …
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Meaning, measurement, and field application of fully softened shear strength of stiff clays and clay shales
… soft to stiff clays, clay shales, mudstones, marls, clayey silt, and glacial clays, using the observed slip surface or possible slip surface determined based on adequate field observations, together with the observed or assumed groundwater pressure conditions reported in the original …
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Long-term Performance of a concrete-lined Tunnel at CERN
… heterogeneous rock mass comprising a sequence of marls and sandstones. Such complex ground conditions in addition to a change in groundwater and tunnel drainage conditions especially after the large seepage flow event in the year 2013 have contributed to additional loading to the tunnel lining and …
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ADVANCED MINERALOGICAL AND CRYSTALLOGRAPHICAL TECHNIQUES FOR UNDERSTANDING TRANSFORMATION PROCESSES IN NATURAL MATERIALS AND THEIR SYNTHETIC ANALOGOUS
… extremely HT and LP metamorphism especially for marls and limestone, increasing the difficulties to better explain CP process. Cement represents the most important building materials used for all constructions ranging from ordinary urban planning (civil houses, road foundations, etc.) to …
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The mio-eugeosynclinal thrust interface and related petroleum implications in the Sason-Baykan Area, Southeast Turkey
… and southern marginal basin. Lice grey marls, shales and graywackes accumulated on the southern outer flanks of the northern geosyncline. Red marl, flysch and red clastic sequence of the Sason-Baykan group with accompanying basic igneous rocks was deposited in the inner eugeosynclinal …
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