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Dawson Arkose

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—Diagram showing relation of <span class="search-highlight">Dawson</span> <span class="search-highlight">arkose</span> to Denver and Arapahoe formation...
Published: 01 October 1936
FIG. 2. —Diagram showing relation of Dawson arkose to Denver and Arapahoe formations.
Journal Article
Journal: GSA Bulletin
Published: 01 January 1943
GSA Bulletin (1943) 54 (1): 65–86.
... limits the position of the Cretaceous-Tertiary boundary in that area. As this boundary definitely places the basal portion of the Denver formation and Dawson arkose in the Upper Cretaceous sequence, some changes in the nomenclature of these and other strata adjacent to the boundary become necessary...
Journal Article
Journal: AAPG Bulletin
Published: 01 March 1961
AAPG Bulletin (1961) 45 (3): 414.
...Harry W. Oborne ABSTRACT The Dawson formation was named the Dawson arkose in 1915 by Richardson, the type locality being at Dawson Butte, 6 miles southwest of Castle Rock. Because much of the stratigraphic section contains more fine clastics and carbonaceous material than arkose, the change in name...
Journal Article
Journal: AAPG Bulletin
Published: 01 October 1936
AAPG Bulletin (1936) 20 (10): 1308–1328.
...FIG. 2. —Diagram showing relation of Dawson arkose to Denver and Arapahoe formations. ...
FIGURES | View All (4)
Image
Stratigraphic chart showing units mentioned in text. Relative thickness rel...
Published: 01 January 2002
sequence is approximately equivalent to upper part of Dawson Arkose of conventional stratigraphic nomenclature.
Image
Study area photos. (A) View looking northwest from the Salida-Waugh Mountai...
Published: 12 May 2022
Mountain Erosion Surface (RMES). Wall Mountain Tuff directly overlies the RMES in this location, with Tallahassee Creek Conglomerate overlying the tuff. (C) View looking southwest from Rock Park in the town of Castle Rock. The Castle Rock boulder conglomerate unconformably overlies the Dawson Arkose
Image
—Reconnaissance geologic map of southeastern part of Denver Basin, Colorado...
Published: 01 October 1936
indicative of Laramie age. V. Localities at which dinosaur bones have been collected from Dawson arkose. Numbers (V-1 and V-2) refer to text of this paper.
Journal Article
Published: 01 January 2002
Rocky Mountain Geology (2002) 37 (2): 111–134.
... orogeny is contained in rocks overlying the Laramie Formation. In the Denver Basin, these strata have been named the Arapahoe and Denver Formations and the Dawson Arkose. The historical context is summarized in the cross sections of Figure 5 . Figure 4. Isopach map of Laramie Formation. Contour...
FIGURES | View All (17)
Journal Article
Published: 01 May 1983
Canadian Journal of Earth Sciences (1983) 20 (5): 886–891.
...P. Metcalfe; G. S. Clark Abstract Seven samples of metarhyolite from a measured section of the Klondike Schist, in the Yukon Crystalline Terrane, 5 km southwest of Dawson City, give a whole-rock Rb–Sr isochron age of 202 ± 11 Ma with an initial 87 Sr/ 86 Sr ratio of 0.7140 ± 0.0001. The high...
Journal Article
Published: 01 January 2002
Rocky Mountain Geology (2002) 37 (2): 229–236.
... are considered to be fluvial deposits ( Robson, 1987 ). It is contained within the Dawson Arkose, which has been subdivided into two members separated by a paleosol layer. The lithologically diverse lower member is composed of andesitic and arkosic grains of various sizes, and beds of carbonaceous shale...
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Journal Article
Published: 01 January 2003
Rocky Mountain Geology (2003) 38 (1): 101–120.
... ; Soister and Tschudy, 1978 ; Bryant et al., 1981 ). The formally named formations in stratigraphic order are: the Pierre Shale, Fox Hills Sandstone, Laramie Formation, Arapahoe Formation, Denver Formation, and Dawson Arkose. All of these units preserve fossil plants, but those found in the marine Pierre...
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