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Bear River and Aspen formations

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Journal Article
Journal: GSA Bulletin
Published: 01 April 1954
GSA Bulletin (1954) 65 (4): 315–326.
... 2 of these, in the upper 166 feet of the formation, contain invertebrates. One assemblage is similar to the typical fresh-water Bear River fauna; the other is brackish water. The Aspen has 25 fossiliferous units, of which only 9 contain invertebrates. Seven of these are fresh water, and 2...
Image
—Source rocks in the Lower Cretaceous <span class="search-highlight">Bear</span> <span class="search-highlight">River</span> and <span class="search-highlight">Aspen</span> <span class="search-highlight">formations</span> on th...
Published: 11 October 1994
Figure 3 —Source rocks in the Lower Cretaceous Bear River and Aspen formations on the Prospect, Darby, and Absaroka plates contain variable amounts of type I, type II, and type III organic matter ranging in maturity from early mature to postmature.
Series: GSA Memoirs
Published: 01 July 1955
DOI: 10.1130/MEM63-p1
... successions and of the Bear River and Aspen formations of the Upper Cretaceous are included in the text, and other measured sections have been placed on open file at the office of The Geological Society of America, where they may be consulted. ...
Image
—Model proposed by  Wallem et al. (1981)  to explain advanced maturity of o...
Published: 11 October 1994
Figure 5 —Model proposed by Wallem et al. (1981) to explain advanced maturity of organic-rich shales in the Bear River and Aspen formations on the Darby plate. Although burial by the Absaroka thrust may explain some of the advanced maturity of Lower Cretaceous source rocks on the Darby plate
Image
—Whitney Canyon site,  Warner and Royse (1987)  constant gradient model (da...
Published: 01 July 1987
history curves for Cretaceous Frontier (Kf) and Aspen-Bear River (Kab) formations. (B) Thermal histories. Aspen-Bear River more deeply buried, thus reaching higher temperatures. (C) Maturation histories. Measured values marked with * . Once thermal history corrected to properly include disequilibrium
Image
—Whitney Canyon site,  Warner and Royse (1987)  constant gradient model (da...
Published: 01 July 1987
and erosion rates. (A) Burial history curves for Cretaceous Frontier (Kf) and Aspen-Bear River (Kab) formations. Stair step at 76 Ma due to burial beneath Absaroka plate. (B) Thermal histories. Aspen-Bear River more deeply buried, thus reaching higher temperatures. (C) Maturation histories. Measured maturity
Image
—Isopachous map of the Lower Cretaceous Series and generalized section. Map...
Published: 01 November 1965
FIG. 11. —Isopachous map of the Lower Cretaceous Series and generalized section. Map modified from Haun and Barlow (1962 , p. 16). Stratigraphic units shown on section: Kw, Wayan Formation; Kg, Gannett Group; Ka, Aspen Formation; Kbr, Bear River Formation.
Series: GSA Special Papers
Published: 28 December 2018
DOI: 10.1130/2018.2540(23)
EISBN: 9780813795409
... of the Aptian(?) to Albian Gannett Group (Ephraim and Bechler Formations); (3) Upper Albian Smiths, Thomas Fork, and Cokeville Formations and correlative Bear River Formation; (4) uppermost Albian to Cenomanian Sage Junction Formation and partly correlative Aspen Shale; and (5) Upper Cenomanian to Turonian...
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Journal Article