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Wanakah Formation

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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 01 April 2016
Lithosphere (2016) 8 (2): 185–193.
...Sally L. Potter-McIntyre; Marisa Boraas; Keegan DePriest; Andres Aslan Abstract The Middle Jurassic Wanakah Formation in western Colorado is a poorly understood unit in terms of depositional environment and absolute age of deposition; however, a refined interpretation of the provenance has...
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Image
<b>Wanakah</b> <b>Formation</b> features. (A) Escalante Canyon (section is 30 m). (B) Dun...
Published: 01 April 2016
Figure 3. Wanakah Formation features. (A) Escalante Canyon (section is 30 m). (B) Duncan Trail in Black Canyon of the Gunnison (trees, ∼100 m tall, for scale). Yellow dashed line in A and B separates a regional feature of lower red shale from underlying a green shale. (C) Ten Mile Graben. (D
Series: AAPG Studies in Geology, AAPG Studies in Geology
Published: 01 January 1986
DOI: 10.1306/St22455C2
EISBN: 9781629811475
... Abstract The Middle Jurassic San Rafael Group and Upper Jurassic Morrison Formation of the San Juan basin consist of complexly interrelated conglomerate, sandstone, silt- stone, mudstone, limestone, and gypsum. The San Rafael Group, consisting of the Entrada Sandstone, Wanakah Formation, Cow...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1951
AAPG Bulletin (1951) 35 (5): 1105–1106.
... be in the overlying marine Cretaceous rocks, the included Wanakah formation, and the locally truncated and overlapped marine Paleozoic sediments. Meager outcrops and well data suggest repeated overlap relations in beds of Pennsylvanian age. These marine units contain coarse clastic facies, which were deposited...
Journal Article
Journal: AAPG Bulletin
Published: 01 September 1941
AAPG Bulletin (1941) 25 (9): 1745–1767.
... characterize the Summerville marls as they do those of the Wanakah. We, therefore, believe that the two formations are equivalent to each other. As indicated by Figure 1 , the Junction Creek sandstone thins within short distances away from the La Plata Mountains. Nothing that might be equivalent to it has...
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Journal Article
Journal: GSA Bulletin
Published: 01 August 1944
GSA Bulletin (1944) 55 (8): 951–992.
...WILLIAM LEE STOKES Abstract The Morrison formation in and adjacent to the Colorado Plateau currently includes diverse lithic units, many of which cannot properly be included if the limitations of the type section and relationships to other formations are considered. The Todilto limestone, Bluff...
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1972
AAPG Bulletin (1972) 56 (3): 605.
...R. G. Bray; J. R. Beerbower Abstract The predominance of clay minerals, pelleted texture, burrow traces, and pyritized material in the Wanakah Shale member of the Ludlowville Formation suggests a soft, granular sediment. An analysis of the fossil assemblages reveals a relation between...
Image
Stratigraphy of western Colorado and Escalante Canyon study site. Black das...
Published: 01 April 2016
Figure 1. Stratigraphy of western Colorado and Escalante Canyon study site. Black dashed lines show formation boundaries. Contact between 1 and 2 is a scour surface between Entrada Sandstone and Wanakah Formation. Numbers indicate sample locations for detrital zircon analysis. 1—Jebb (Entrada
Journal Article
Journal: AAPG Bulletin
Published: 01 August 1982
AAPG Bulletin (1982) 66 (8): 1170.
...Gerald J. Kloc In the Seneca Lake region, both the Ledyard and Wanakah members of the Middle Devonian Ludlowville formation have a black shale fades. This grades westward to a gray shale facies and eastward to a gray shale and siltstone facies. The black shale facies represents an anoxic...
Journal Article
Published: 18 November 2019
Journal of Sedimentary Research (2019) 89 (11): 1075–1095.
...; Fig. 4 ), which can be traced throughout and beyond the study area, as it also corresponds to the base of Moab Member (Curtis Formation) as well as the Todilto Member (Wanakah Formation) in the Four Corners area ( Fig. 2 C; Zuchuat et al. 2018 ). The upper Curtis subtidal to intertidal deposits (FA 6...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 1956
AAPG Bulletin (1956) 40 (9): 2120–2148.
... to it.” The Ralston formation includes the series of shale and gypsum beds which extend from Cañon City northward along the Front Range to northern Colorado. Imlay (1952) included these beds in the Wanakah formation and assigned an Upper Jurassic age on the basis of correlations with the Swift formation of Montana...
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Series: GSA Field Guides
Published: 04 September 2019
DOI: 10.1130/2019.0055(19)
EISBN: 9780813756554
... of this retreating sea are preserved in the upper Middle Jurassic (later Callovian) Stump and Sundance Formations. The Summerville Formation and Wanakah Formation (a lithostratigraphic component of the San Rafael Group east of the Monument upwarp in southeastern Utah and southwestern Colorado) chronicle fluvial...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2014
GSA Bulletin (2014) 126 (7-8): 1105–1116.
...Timothy S. Myers; Neil J. Tabor; Nicholas A. Rosenau Abstract Elemental analyses of paleosol B horizons in the Upper Jurassic Morrison Formation of the western United States provide estimates of mean annual precipitation (MAP) and allow determination of humidity regimes. Samples were collected from...
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Image
Age populations as distributed in major age categories as defined by  Dicki...
Published: 01 April 2016
Figure 5. Age populations as distributed in major age categories as defined by Dickinson and Gehrels (2003 , 2008 , 2010 ). Note the dramatic increase in Neoproterozoic Appalachian orogen population beginning with Jeef (interpreted herein as basal Wanakah Formation) and ending in 1Jmt (Marker
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1943
AAPG Bulletin (1943) 27 (5): 571–595.
... of shale and limestone. These comprise, in ascending order, the Bell shale, Rockport Quarry limestone, Ferron Point shale, and Genshaw formation. Reefs and biostromes are prominent in the middle of the section. The formations resulting from this type of deposition are the Newton Creek limestone, Alpena...
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Journal Article
Journal: Paleobiology
Published: 01 September 2012
Paleobiology (2012) 38 (4): 585–604.
... in paleoecological and paleoenvironmental studies, we compare samples from three Upper Jurassic localities. Soil p CO 2 estimates, interpreted as a qualitative indicator of primary paleoproductivity, are used to rank the Late Jurassic terrestrial environments represented by the Morrison Formation in western North...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 1947
AAPG Bulletin (1947) 31 (9): 1664–1668.
.... For example, detailed work in western Colorado by Fischer and others 4 shows that the Summerville formation extends into that area as a traceable lithologic unit and is equivalent at least in part to the Wanakah formation. The Navajo sandstone also has been extended farther east than originally supposed...
FIGURES
Journal Article
Journal: AAPG Bulletin
Published: 01 November 1965
AAPG Bulletin (1965) 49 (11): 2041–2075.
... and others, 1946; Baltz and Bachman, 1956 ). The Todilto tongues out northward and eastward into a sequence of locally gypsiferous, reddish to waxy-green shale that contains interbedded thin, fine- to medium-grained sandstone, and red chalcedony beds. This sequence was correlated with the Wanakah Formation...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1948
AAPG Bulletin (1948) 32 (1): 68–81.
..., Reeside, op. cit ., now make use of the term Wanakah formation to include the Todilto limestone and gypsum. 19 Baker, Dane, and Reeside, op. cit ., possibly would refer this unit to the San Rafael group and group it with the Todilto limestone and gypsum under the term Wanakah formation...
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Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/SP278.5
EISBN: 9781862395268
... of the Ledyard and Wanakah Members contain several important goniatite-bearing intervals. The Alden Pyrite bed in the lower Ledyard Member contains the goniatite Tornoceras ( T. ) uniangulare aldenense , while the laterally equivalent lower shales of the Widder Formation in Ontario contain Tornoceras ( T...
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