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The Cretaceous-age Niobrara Chalk in western Kansas was deposited in a massive inland sea that ran north to south across west-central North America about 80 million years ago. Monument Rocks and Castle Rock , two sets of chalk spires that rise above the plain in Gove County, are composed of chalk formed from the enormous amount of ooze that ...The goal of this field-based research project is to establish a tight oil field laboratory in the Powder River Basin (PRB). The field laboratory will be used to characterize and overcome the technical challenges of developing two large, emerging unconventional/shale oil formations, the Mowry Shale, and the Belle Fourche Shale, with the challenging tight sands of the Frontier and Niobrara ...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 topThe Niobrara Formation is an active petroleum play (Han et al., 2019), currently (June, 2023) producing ∼650,000 barrels of oil per day and ∼5 billion cubic feet …The formation also is easily identified on electric logs. Thickness--Thickness of the Niobrara Formation in Kansas ranges from 0 to 750 feet (Fig. 19). Figure 19--Isopachus map of Niobrara Formation in Kansas. Contour interval 50 feet. A larger version of this figure is available. Geology Site 2 - At this road cut, the Cretaceous Niobrara Formation is overlain by the Pembina Member, the lowermost member of the Pierre Shale in the area. These rocks were laid down in oceans that covered most of North Dakota about 84 million years ago. The Niobrara consists of light-gray to yellowish-tan, blocky, calcareous marl.The Upper Cretaceous Niobrara formation yields natural gas of biogenic origin from structural closures on the shallow-dipping east flank of the Denver basin and the northern plunge of the Las Animas arch. Current production is from structural traps in the Smoky Hill member of the formation, with most of the fields located in Colorado and Kansas ...The Niobrara Formation, also called the Niobrara Chalk is a geologic formation in North America that was laid down between 87 and 82 million years ago during the Coniacian, Santonian, and Campanian ages of the Late Cretaceous. It is composed of two structural units, the Smoky Hill Chalk Member overlying the Fort Hays Limestone Member. The chalk formed …Named as top formation of Lower Cretaceous series, top of Lower Cretaceous. Formerly called "formation No. 3" (Meek and Hayden, 1857). Type not designated. Named for Niobrara River, Knox Co, NE in Salina basin, where formation forms 90-100 ft cliffs near mouth along Missouri River.The Niobrara Formation /ˌnaɪ.əˈbrærə/, 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 … See moreNiobrara Limestone, division of rocks in the central United States dating to the Late Cretaceous Period, which ended some 65.5 million years ago. Named for exposures …Assigned formation rank (Sage Breaks Shale) in northwest Carbon Co, WY, Greater Green River basin. Here unit overlies Frontier Formation and underlies Niobrara Formation. Assigned as lower member of Cody Shale in Natrona Co, WY, in Wind River basin and as upper member of Carlile Shale in Weston Co, WY, eastern Powder River basin.The Niobrara Formation was deposited in the Western Interior Seaway (WIS), which filled an active foreland basin during the Upper Cretaceous. The WIS experienced important oceanographic variations ...The Niobrara Formation was deposited in the Western Interior Seaway (WIS), which filled an active foreland basin during the Upper Cretaceous. The WIS experienced important oceanographic variations ...The Upper Cretaceous Karababa and Karabogaz formations in southeastern Turkey extend from Osmaniye in the west to Diyarbakir in the east, covering an area nearly 300 km long and 150 km wide (Fig. 1). The organic-rich carbonates are similar to the unconventional fluid oil and biogenic gas-producing Niobrara Formation in North America.education.aapg.orgHorizontal drilling within the Powder River Basin (PRB), is moving from appraisal towards co-development of horizontal targets within the Niobrara and Turner Sandy member of the Carlile formations ...Porosity and permeability of several core samples from the Middle Bakken, Lower Eagle Ford, and Niobrara formations were studied and the results, using …The Niobrara Total Petroleum System (TPS) covers an extensive area across the Rocky Mountain Region, USA. In the Powder River Basin (PRB), the petroleum system consists of source beds in the Upper Cretaceous Niobrara Formation as well as reservoirs in the Upper Cretaceous Frontier, Turner, Niobrara, Sussex, Shannon, Parkman, Teapot, and Teckla, and …The Turonian–Campanian Niobrara Formation of the Western Interior basin, U.S.A., is characterized by decimeter-scale rhythmic alternations of chalk and marl beds and decameter-scale oscillations of chalky and marly facies.This study applies recent advances in quantitative cyclostratigraphic analysis to high-resolution geophysical …

Carlile Shale (Upper Cretaceous) at surface, covers < 0.1 % of this area. Dark-gray to black, silty to sandy shale with several zones of septarian, fossiliferous, carbonate concretions. Contains up to three sandstone units in the upper portion of the formation and sandy calcareous marl at the base. Thickness up to 330 ft (100 m).The Niobrara Formation in the studied cores appears to be hiatus-free and therefore provides a continuous record of rhythmic deposition for astronomical timescale development. The relationship between carbonate content and sedimentation rate throughout the Niobrara Formation indicates that the decameter-scale oscillations of chalk and marl are ...This interval comprised a thick unit of marine shale with minor intercalation of siltstones, which refers to the Verger Member at the bottom of the Niobrara Formation and is dated mid to late Coniacian based on ammonite Scaphites ventricosus and S. depressus zones (Caldwell et al., 1978).The formation also crops out along Sappa Creek, in Decatur and Norton counties, and along Prairie Dog Creek in Norton and Phillips counties, as southwestward extensions of the Nebraska Niobrara outcrop (Fig. 1). Altogether, the Niobrara crops out in parts of 23 Kansas counties (Fig. 1).Life of the Niobrara Chalk is comparable to that of the Dakota Formation, although the Dakota Formation, which was deposited during the Cenomanian, predates the chalk by about 10 million years. Table key Bony fish Pycnodontiformes Semionotiformes Pachycormiformes Crossognathiformes Ichthyodectiformes Tselfatiiformes Aulopiformes Beryciformes

In the News: Associated natural gas production increased 9% in 2022 due to higher crude oil production . In 2022, annual production of associated-dissolved natural gas (or associated natural gas) increased 9% to 15.5 billion cubic feet per day (Bcf/d) in the major U.S. onshore crude oil-producing regions (Permian, Bakken, Eagle Ford, Niobrara, and Anadarko) mostly due to an 8% increase in ...Introduction The recent increase in North American unconventional oil and gas production has spurred exploration efforts into organic rich formations throughout the ……

Reader Q&A - also see RECOMMENDED ARTICLES & FAQs. The boundary between the Carlile and Niobrar. Possible cause: The Niobara Formation is an ancient geological formation that has existed for al.