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Frontier-Niobrara contact

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Journal Article
Journal: AAPG Bulletin
Published: 01 September 1936
AAPG Bulletin (1936) 20 (9): 1189–1197.
... relationship of beds of Carlile and Niobrara age between Kansas, Laramie Basin, and western Wyoming. Horizon of Frontier-Hilliard contact is uncertain in respect to Laramie Basin section and is only diagrammatically represented here. ...
FIGURES
Journal Article
Published: 01 January 2007
Rocky Mountain Geology (2007) 42 (2): 95–122.
..., and Niobrara Formation ( Figs. 3 , 4 ). Correlative nearshore-marine and nonmarine beds in western parts of that region are often within, from oldest to youngest, (1) the Tununk, Ferron Sandstone, and Blue Gate Members of the Mancos Shale; or (2) the Frontier Formation and overlying Hilliard Shale or Cody...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 1974
AAPG Bulletin (1974) 58 (5): 915–916.
... of the rocks directly below the unconformity decreases and the age of the rocks directly above the unconformity increases. The upper unconformity is generally at the contact of the Frontier or Benton and the overlying calcareous shale and limestone of the Niobrara (between beds of Carlile and Niobrara ages...
Image
—Diagrammatic restored section showing relationship of beds of Carlile and ...
Published: 01 September 1936
FIG. 1. —Diagrammatic restored section showing relationship of beds of Carlile and Niobrara age between Kansas, Laramie Basin, and western Wyoming. Horizon of Frontier-Hilliard contact is uncertain in respect to Laramie Basin section and is only diagrammatically represented here.
Journal Article
Journal: AAPG Bulletin
Published: 01 October 1952
AAPG Bulletin (1952) 36 (10): 1913–1961.
... 108-F (1918). 15 J. B. Reeside, Jr., in H. D. Thomas, “Frontier-Niobrara Contact in Laramie Basin, Wyoming,” Bull. Amer. Assoc. Petrol. Geol. , Vol. 20, No. 9 (September, 1936), p. 1196. 16 A. C. Veatch, “Coal Fields of East-Central Carbon County, Wyoming,” U. S. Geol. Survey Bull...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 2021
AAPG Bulletin (2021) 105 (9): 1779–1796.
... by the Niobrara Formation or Juana Lopez Member calcarenite across much of the Denver Basin. The Codell is in gradational and in some places unconformable contact with the underlying Carlile Shale. Thickness of the Codell Sandstone ranges from a wedge edge to approximately 100 ft (∼30.5 m) ( Figure 6...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1948
AAPG Bulletin (1948) 32 (1): 52–67.
... approximately 8 miles long and 4 miles wide with approximately 5,000 feet of closure. The crest of the structure is a topographic basin and the oldest formation exposed on the crest of the structure is the Niobrara shale of the Colorado group of Upper Cretaceous age. A complete section from the Fort Union...
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Journal Article
Journal: AAPG Bulletin
Published: 01 August 1944
AAPG Bulletin (1944) 28 (8): 1196–1216.
.... Petrol. Geol. , Vol. 18 , No. 12 ( 1934 ), pp. 1665 - 97 . 18. THOMAS , H. D. , “ Frontier-Niobrara Contact in Laramie Basin, Wyoming ,” ibid. , Vol. 20 , No. 9 ( 1936 ). FIG. 1. STRATIGRAPHIC SECTION OF FREEZEOUT TONGUE OF CHUGWATER, MEASURED NEAR DIFFICULTY POST OFFICE...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1966
AAPG Bulletin (1966) 50 (10): 2185–2196.
... of the Upper Cretaceous in the Rocky Mountain area. The stratigraphic interval between the Mowry Shale and the Niobrara Formation contains the Frontier and equivalent formations. The interval containing this section is more than 1,000 feet thick in central, northeastern, and west-central Wyoming...
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Journal Article
Journal: AAPG Bulletin
Published: 01 November 1968
AAPG Bulletin (1968) 52 (11): 2098–2115.
... paper deals exclusively with the contact between the Niobrara Formation and the overlying Pierre Shale in eastern Colorado, discusses microfossil occurrence in Colorado. However, unpublished M.A. and Ph.D. theses at the University of Colorado ( Bates, 1949 ; Fischer, 1953 ; Lamb, 1964 ) described...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1960
AAPG Bulletin (1960) 44 (1): 1–20.
..., lower Carlile shale, lower Frontier formation of central Wyoming, and the marine tongue in the Frontier formation of western Wyoming during the earliest transgression (T 1 ); the upper Frontier formation of western and central Wyoming, and the upper Carlile shale during the R 1 regression; the Niobrara...
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Journal Article
Journal: AAPG Bulletin
Published: 01 August 1923
AAPG Bulletin (1923) 7 (5): 488–506.
... and Montana shales. Both groups are of marine origin and contain sandstone members of great importance as oil reservoirs. The Colorado group is subdivided into the Thermopolis shale at the base, above which in ascending order, are the Mowry, Frontier, Carlile, and Niobrara formations. The Montana group...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1952
AAPG Bulletin (1952) 36 (10): 1962–2010.
... information on the Frontier formation in the Wind River Basin was presented by Thompson et al . (1949). They found a fauna of Carlile and Niobrara aspect that indicated that the top of the Frontier formation was older in the western part of the area than in the eastern part. They reported that Paleozoic...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1924
AAPG Bulletin (1924) 8 (1): 79–87.
... pointed out, is very unsatisfactory. Sandstone in the Benton .—The sand at the top of the Benton, in contact with the Niobrara, has also been the subject of some argument. Some geologists assume that the Carlile shale, which in Wyoming lies between the top of the Frontier and the base of the Niobrara...
Journal Article
Journal: AAPG Bulletin
Published: 01 December 1974
AAPG Bulletin (1974) 58 (12): 2428–2435.
...Max D. Crittenden, Jr. ABSTRACT Two east-northeast-striking steeply dipping faults involving rocks as young as the Frontier Formation (Upper Cretaceous) cross the Weber River at the Rockport Reservoir, 2.5–3.5 mi south of Wanship. Although they originally were interpreted as high-angle normal...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1921
AAPG Bulletin (1921) 5 (2): 186–211.
... of this precise age. In the Salt Creek field of Natrona county the Niobrara has yielded notable amounts of oil, which are believed to have seeped up from the underlying Wall Creek sand of the Frontier formation. The Thermopolis may attain a thickness of 800 feet or more, as is evidenced by sections measured...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1984
AAPG Bulletin (1984) 68 (5): 598–609.
... that between Kansas and South Dakota the base of the Niobrara becomes younger toward the area of thin sediments. North of the area of thinning, the basal unconformity fades and the contact with the Carlile is conformable in northeastern North Dakota and southern Manitoba (C, Figure 9 , 10 ) ( Merewether...
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Journal Article
Journal: AAPG Bulletin
Published: 01 August 1938
AAPG Bulletin (1938) 22 (8): 1020–1047.
... such an assumption of vertical migration from a source in the Lewis shale. Below the Lewis shale in the stratigraphic section lie the Mesaverde formation, the Steele shale, the Niobrara shale, the Carlile shale, the Frontier formation, the Mowry shale, and the Dakota sandstone, respectively. These formations...
FIGURES
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1947
AAPG Bulletin (1947) 31 (9): 1537–1593.
... limestones: many bedsfossiliferous Frontier 2,750 Tan sandstones with some interbedded shales; many fossiliferous beds Mowry shale 1,070 Siliceous shales, salt-and-pepper sandstone, porccllanite, and bentonite beds Thermopolis shale 318 Black shale and argillaceous sands!one Lower...
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Journal Article
Journal: AAPG Bulletin
Published: 01 February 1926
AAPG Bulletin (1926) 10 (2): 105–129.
... prerequisite in the process outlined, the hard members in general being of importance only as markers of the movements. When, however, the hard member is porous, it becomes of practical importance as a possible reservoir for oil and gas. It is at once apparent that the Benton, Frontier, Niobrara...
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