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Showing 1 to 20 of 25 for “"Geology--North Dakota; Geology"”.
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Glacial stratigraphy of southeastern North Dakota
… in the glacial sediment {till) of southeastern North Dakota. Five of these units are not formally named; eventually most of these units will be correlated with formations in surrounding regions. Two of these units, Gardar and Dahlen, are formations recognized in northeastern North Dakota {Hobbs, …
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The Hell Creek Formation in North Dakota
… and petrology of the Hell Creek Formation in North Dakota and eastern Montana. Principal area of study included the Missouri Valley south of Bismarck, North Dakota; the Little Missouri Valley in Slope and Bowman Counties, southwestern North Dakota; the Yellowstone Valley near Glendive, Dawson …
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Paleozoology of cores from the Tyler Formation (Pennsylvanian) in North Dakota, U.S.A.
… report of the family Tealliocarididae from. North .America and the first Pennsylvanian genus recognized in the family.</p> <p>The Tyler Formation was determined to be of Pennsylvanian (Morrowan, Atokan, and Deamoinesian) age based on the previously reported ranges of contained taxa. Four …
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Origin and distribution of selenium in the upper Cretaceous Niobrara and Pierre formations, northeastern North Dakota
… and Pierre Formations of Cretaceous age in northeastern North Dakota. A 64-foot section in the Pembina Hills area reveals that the highest selenium content occurs in shale and marlstone beds adjacent to the bentonite beds which, themselves, contain comparatively little selenium. Higher …
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Stratigraphy and paleontology of the upper Cretaceous Morden Member (Vermilion River Formation) in the outcrop area, northeastern North Dakota
… Member is the oldest exposed bedrock unit in North Dakota, cropping out in eastern Cavalier County in the northeastern part of the state. The Morden overlies the Greenhorn Formation and underlies the Niobrara Formation. The Canadian Morden Member of the Vermilion River Formation is used in …
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The stratigraphy and economic potential of Permo-Pennsylvanian strata in southwestern North Dakota
… of the Fermo-Pennsylvanian Minnelusa Group in North Dakota was designed to clarify the stratigraphy, illustrate association of depositional environments, and to relate the geologic history and economic potential of these strata.</p> <p>The Minnelusa Group is defined here to include strata above …
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Petroleum potential of the Tilston interval (Mississippian) of central North Dakota
… on the eastern flank of the Williston basin of North Dakota, Manitoba and Saskatchewan. The interval (Osagian) is composed of a basal carbonate and upper anhy drite in the predominantly carbonate Mississippian Madison Formation. The interval consists of four major facies (subtidal, shoal, tidal …
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Stratigraphy of the Winnipeg and Deadwood Formations in North Dakota
… all of the pre-Winnipeg sedimentary rocks of North Dakota which range in thickness from an erosional edge in the subsurface of northeastern North Dakota to at least 1,000 feet in northwestern North Dakota. It is composed of sandstone, shale, and carbonate of Late Cambrian to Early Crdovician …
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The Spearfish Formation in the Williston Basin of western North Dakota
… been traced into the Williston Basin of western North Dakota. In the basin, the formation can be divided into three members. In ascending order these are: (1) a lower gray shale and red siltstone unit herein named the Belfield Member, (2) a middle salt unit, the Pine Salt Member, and (3) an upper …
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Concretions and nodules in the Hell Creek Formation, southwestern North Dakota
… Formation (Upper Cretaceous) in southwestern North Dakota consists of lagoonal and floodplain deposits and contains abundant concretions and nodules. Representative specimens of the concretions and nodules and their corresponding enclosing sediments were analyzed by thin section and by …
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The upper Red River Formation (Ordovician) in western North Dakota
<p>The upper Red River Formation in Western North Dakota consists of cyclic sedimentary rocks having four main porosity zones which contain most of the oil and gas found in the formation. It was divided into three distinct units that were traced throughout western North Dakota on mechanical logs. …
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Mollusks from Wisconsinan (Pleistocene) ice-contact sediments of the Missouri Coteau in central North Dakota
… 50 by 300 miles in extent) in central North Dakota.</p> <p>Fossil mollusks, contained in sediments deposited in contact with the stagnant ice at 40 sites, are represented by 23 species including polecypods of the families Unionidae and Sphaeriidae and gastropods of the families …
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The petroleum geology of the Midale subinterval in north central North Dakota
… an important petroleum producing unit in North Dakota, is a dolomitized limestone which is approximately 40 feet thick. A detailed study of 17 oil fields in north central North Dakota was conducted to determine the petroleum geology of the Midale subinterval. The study was done with the …
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The structural and stratigraphic relationships in the Paleozoic rocks of eastern North Dakota
… commonly defined Paleozoic rock units in eastern North Dakota has been determined by a study of mechanical well logs. Isopachous wops of these units reveal several positive areas which persisted and influenced sedimentation and unit thickness throughout most of the Paleozoic Era. Precambrian …
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The micropaleontology and stratigraphy of the subsurface "Heath" formation (Mississippian-Pennsylvanian) of western North Dakota
… Formations in the subsurface of southwestern North Dakota, is a source of petroleum in the Scoria-Fryburg, Rocky Ridge and Dickinson oil fields. Cores, cut from the interval under study, of twenty wells in this area, were the source of fossil and lithologic samples studied. Changes in …
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Recent fluvial geology in western North Dakota
… Mr. Clayton was chairman. </p><p> In western North Dakota many drainage channels that are incised into valley fill are characterized by steep, unvegetated sides. Many such channels contain actively eroding scarps. The origin of these scarps is most frequently related to increased water …
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Hydrologic factors affecting the discharge of ground water in the Red River of the North Basin, northeastern North Dakota
… amounts of salinity to the Red River of the North. The area of major discharge is represented on the land surface by saline soils, wetlands, and flowing wells. As tributaries flow through these areas, the dissolved-solids concentrations in the streams increase. This salinity is then …
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Paleontology and stratigraphy of the Niobrara Formation (Upper Cretaceous) of eastern North Dakota with emphasis on the calcareous nannoplankton
… Upper Cretaceous Niobrara Formation in eastern North Dakota consists of calcareous shales, chalks, and shaly chalks. The formation was studied from surface exposures, cores, and well logs. The Niobrara is 62 feet (19m) to 272 feet (83 m) and is thickest to the northeast, in a central linear …
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