U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Plainview sandstone member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Shale
  • AAPG geologic province:
    • Denver basin
Publication:

Waage, K.M., 1955, Dakota group in northern Front Range foothills, Colorado, IN Shorter contributions to general geology, 1955-57: U.S. Geological Survey Professional Paper, 274-B, p. B15-B51. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp274B]


Summary:

Named as basal member of South Platte formation of Dakota group for exposures in the cut of the Denver and Salt Lake RR through the Dakota hogback at Plainview, NE1/4 NE1/4 sec 12, T2S, R71W, Jefferson Co, CO in Denver basin. No type section designated, though a section measured at location above. Is a light gray, fine-, medium- to coarse-grained sandstone which has some cross laminated to cross-bedded units. Basal sandstone is conglomeratic. Is interbedded with dark gray to black shale which has local thin concretionary lenses of pyritic silt and gray argillaceous thin-bedded siltstone. Is 56+/-ft at measured section. Has a maximum thickness of 65 ft. Disconformably overlies Lytle formation of Dakota group. Underlies an unnamed shale and sandstone of the South Platte. Has a nonmarine phase in the south and a marine phase in the north. Correlation with other Cretaceous units in Powder River basin northeast WY, Wind River basin central WY, and Denver basin southeast WY, northeast and south-central CO shown on fig 19. Is of Early Cretaceous age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Plainview Formation
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Denver basin
Publication:

MacKenzie, D.B., 1965, Depositional environments of Muddy Sandstone, western Denver basin, Colorado: American Association of Petroleum Geologists Bulletin, v. 49, no. 2, p. 186-206. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Shown on "Correlation chart" as one of four formations of Lower Cretaceous Dakota Group, as unconformably overlying Lytle Formation of Dakota and as beneath Skull Creek Shale (extended from south-central WY) into northern Front Range foothills, from Loveland to Boxelder Creek (sec 9, T10N, R69W), Larimer Co, CO in the Denver basin. [No discussion of modification of stratigraphic rank change.] Correlation chart.

Source: GNU records (USGS DDS-6; Denver GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).