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source rocks of the Phosphoria Formation, which contain Type-IIS kerogen, occurred in the Late Cretaceous (80 to 73 Ma [million years]). Gas generation from the cracking of Phosphoria oil reached a peak in the late Paleocene (57 Ma) only in the deepest parts of the province. The Mowry Shale, Niobrara Formation, and Baxter Shale (and equivalents)The Niobrara Formation over the Carlile Shale in bluffs along the valley, near St. Helena, Cedar County, Nebraska, p. 24 8c. An aerial photograph of the town of Fort Calhoun, Nebraska, and the terrace that was the site of Lewis 2. A roadcut in loess with vertical and Clark's Council Bluff, p. 13 fractures on the north side of U.S.The Pierre Shale is underlain by the Niobrara Formation throughout all of the northern Great Plains and the Niobrara is the target of exten­ sive recent exploration for natural gas. The Pierre is covered by units of Late Cretaceous, Tertiary, and Pleistocene age. It appears that theNiobrara Formation (Upper Cretaceous) at surface, covers < 0.1 % of this area. White to dark-gray argillaceous chalk, marl, and shale. Weathers yellow to orange. Contains thin, laterally continuous bentonite beds, chalky carbonaceous shale, minor sand, and small concretions. Thickness up to 150 ft (46 m). Calibrated petrophysical model for elevated organic matter intervals and mineralogical variability in the Agrio Formation, Neuquén Basin, Argentina. Raul I. Ochoa, Lauren P. Birgenheier, Ernesto Schwarz, Jesús M. Salazar. Article 105913.In the Upper Cretaceous Niobrara Formation shale oil play, considerable oil fractions are produced directly from C 14+ bitumen in place (e.g., extractable organic matter). ). This paper provides new insights on the geochemistry and producibility of C 14+ bitumen by integrating the full process of generation, retention, conversion, expulsion, and production, as a whole, in the Niobrara shale ...Niobrara Formation. Light-colored limestone and gray to yellow speckled limy shale. State. Wyoming. Name. Niobrara Formation. Geologic age. Late Cretaceous.Niobrara Formation (Upper Cretaceous) at surface, covers < 0.1 % of this area. White to dark-gray argillaceous chalk, marl, and shale. Weathers yellow to orange. Contains thin, laterally continuous bentonite beds, chalky carbonaceous shale, minor sand, and small concretions. Thickness up to 150 ft (46 m).The Late Cretaceous Niobrara shale was deposited across the Central Cretaceous Seaway (CCS) from around 89 Ma to around 83 Ma (Dyman et al., 1994; Dean and Arthur, 1998; Longman et al., 1998).The Niobrara is composed of Type II/III organic-rich (1-4 wt% TOC content) chalks and marls, with some detrital quartz and shales in the PRB.The stratigraphy of the Niobrara Formation was described in early. work by Scott and Cobban (1964), where formal and informal. subdivisions were defined. The same subdivisions were consistently used.Niobrara Formation; oil and gas fields; petroleum engineering; propagation; signals; strain; United States; Upper Cretaceous; Wattenberg Field; well stimulation; fiber optics; unconventional reservoirs; Latitude & Longitude N39°49'60" - N40°19'60", W105°00'00" - W104°30'00" View Full GeoRef Record.Properties, Cretaceous Niobrara Formation, DJ Basin, Colorado: AAPG Annual Convention and Exhibition, Pittsburgh, Pennsylvania, May 19-22, 2013 Search and Discovery Article #80314 (2013). Website accessed January 2020. Deacon, M., and K.G. McDonough, 2018, Depositional and stratigraphic complexities of the Niobrara Formation and theFor example, Eze-Aku Shale is similar to Barnett Shale, Horn River Shale, Niobrara Shale Formation, and Chattanooga/Woodford in silica-richness, whilst showing a similar volume of calcite and relatively lesser amounts of clay minerals than the Eagle Ford Shale (Green River) and Haynesville (Fig. 7 and Table 6). Correlation parameters vary ...The Niobrara Formation provides a robust and continuous astronomical signal 9,10 that is constrained with numerous coherent high-precision 40 Ar/ 39 Ar and …The purpose of the study was to evaluate the effectiveness of a machine learning workflow to improve resolution within the reservoir intervals of the Niobrara and Codell formations, the primary targets for development in this portion of the basin. The seismic data are from Phase 5 of the GPI/Fairfield Niobrara program in northern Colorado.The Niobrara Formation na.brr, also called the Niobrara Chalk, is a geologic formation in North America that was deposited between 87 and 82 million years ago during the Coniacian, Santonian, and Campanian stages of the Late Cretaceous. It is composed of two structural units, the Smoky HillOil and Gas Assessment Unit (AU), and the area where depth to Niobrara Formation is more than 8,000 feet..... 43 36. Map of the Powder River Basin Province showing Niobrara Formation . potential sweet spots derived from published lineament and lineament

Cretoxyrhina (/ k r ɪ ˌ t ɒ k s i ˈ r h aɪ n ə /; meaning 'Cretaceous sharp-nose') is an extinct genus of large mackerel shark that lived about 107 to 73 million years ago during the late Albian to late Campanian of the Late Cretaceous.The type species, C. mantelli, is more commonly referred to as the Ginsu shark, first popularized in reference to the Ginsu …operation of the Niobrara Formation. B. Provide that the Commission's pooling order is made effective as of the earlier of the date of this Application, or the date that any of the costs specified in § 34-60-116(7)(b), C.R.S. are first incurred for the drilling of the Wells in the Niobrara Formation on the Application Lands.Niobrara Formation (Late Cretaceous) at surface, covers 6 % of this area. Argillaceous chalk, limestone and shale. Chalk is medium gray to white, interbedded with thin layers of chalky shale; contains many fossil clams, oysters, and formanifera. Limestone is light gray to medium gray and yellowish gray, interbedded with medium-gray chalky shale ...The Niobrara is often compared to the rich Bakken formation in North Dakota, where the total organic compounds in the rock range from 8 percent to 10 percent. In the Niobrara the range is about 1 ...the Niobrara Formation and overlain by the Trinidad Sandstone (Lee, 1917). The age of the base of the Pierre Shale is constrained by ammonite biostratigraphy of the uppermost part of the Niobrara Formation in the Raton Basin and surrounding regions (Scott et al., 1986; Molenaar et al., 2002; Merewether et al., 2011). The age of the top

The Niobrara formation is a very porous, poorly consolidated micrite. Its high porosity and fracture permeability contributes to its fairly low rock embedment strength and its tendency toward fluid imbibition. A moderately high clay content is also evident (Table 1).Niobrara Formation (NM) Unknown Stage Mooreville Formation (AL) Niobrara Formation (CO) Niobrara Formation (Smoky Hill Mbr) (KS) Pierre Shale (SD) Pierre Shale (WY) Selma Chalk (MS) Telegraph Creek Formation (MT) Tylosaurus proriger from the Late Cretaceous (FHSMVP 3). Stratigraphic position unknown. Top;…

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. The Cretaceous rocks in southwestern Minnesota can be correlated wi. Possible cause: This is a stunning, 15.5" long fossilized pectoral fin of a large.