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Showing 1 to 8 of 8 for “"Geology, Stratigraphic -- Devonian."”.
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The sequence stratigraphic evolution of the Sturgeon Lake bank, central Alberta, Canada and its regional implications.
Sturgeon Lake South (SLS) is an isolated Devonian (Late Frasnian) platform located within the Western Canada Sedimentary Basin (WCSB). Stratigraphic correlation of the Leduc Formation across the WCSB reveals a dominantly backstepping stratal geometry. The Sturgeon Lake South bank complex is …
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Lithostratigraphic investigation of a Late Devonian carbonate-evaporite sequence; the Duperow Formation, Williston Basin, North Dakota
… marine shelf during the early part of the Late Devonian (Frasnian). The formation forms the lower part of the Jefferson Group and lithostratigraphic review permits three informal members to be recognized: lower, middle, and upper. Petrographic, lithologic, and well log examination of drill cores …
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A detailed gravity study over a known Devonian carbonate buildup: the Shell Golden Reef, northwestern North Dakota
… reefal facies within the Winnipegosis Formation (Devonian) located at a depth of about 2400 meters. Based only on information from wireline logs and core from two boreholes, the Shell Golden well #34X-34 has been previously interpreted as a pinnacle reef with 70 meters of relief and undetermined …
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Stratigraphy and depositional environments of the Three Forks Formation (Upper Devonian), Williston Basin, North Dakota
<p> The Three Forks Formation (Upper Devonian) is present in the subsurface in the western two-thirds of North Dakota and is generally conformable with the underlying Birdbear Formation and the overlying Bakken Formation. </p><p> The Three Forks attains a maximum thickness of 265 feet (81 meters) …
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Depositional environments and diagenesis, Winnipegosis Formation (Middle Devonian), Williston Basin, North Dakota
<p>In the Williston Basin, the Winnipegosis Formation is the major carbonate unit of the initial transgressive-regressive pulse of the Kaskaskia sequence. Twenty-two lithofacies were identified by well-log, core, and thin-section studies of Winnipegosis rocks; these belong to seven environments of …
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Analysis of petroleum source rocks of the Bakken Formation (Devonian and Mississippian) in North Dakota
<p>The Bakken Formation of North Dakota consists of upper and lower, black, organic-rich shales separated by a calcareous siltstone middle member. The formation is a relatively thin unit (maximum thickness of 145 feet) with the lower shale .attaining a maximum thickness of 50 feet and the upper …
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Diagenesis of the middle member of the Bakken Formation, Williston Basin, North Dakota
… the well. The “trait beds” were inserted in a stratigraphic column of members of the Bakken Formation to compare their structure to the Bakken Formation over the course of the cross section. No distinct patterns were revealed though a larger sample of wells and cores may provide different …
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Conodonts of the Bakken Formation (Devonian and Mississippian), Williston Basin, North Dakota
… Palmatolepis, and Branmehla. Twenty-one biostratigraphically useful species of these genera were identified. Conodonts are unevenly distributed in the Bakken Formation. Most were obtained from thin (about 0.2 in., 0.5 cm), fossil-rich beds in the upper shale. Only rare, fragmentary conodonts …