Dawson Arkose

Dawson Arkose
Stratigraphic range: Early Paleocene
TypeFormation
Unit ofD1 Sequence[1]
Lithology
PrimaryArkosic sandstone
OtherMudstone
Location
RegionColorado
CountryUnited States
Type section
Named forDawson Butte
Named byRichardson (1915)[2]

The Dawson Arkose is a geologic formation in the Denver Basin that underlies the Denver area in Colorado. It is characterized by alternating beds of arkosic sandstone and mudstone.[1][3] The Dawson Arkose contains plant remains[4] and other nonmarine fossils, and hosts aquifers that are important sources of water for the area.[5]

  1. ^ a b Raynolds, R.G. 2002. Upper Cretaceous and Tertiary stratigraphy of the Denver Basin, Colorado. Rocky Mountain Geology, vol. 37, no. 2, p. 111-134.
  2. ^ Richardson, G.B. 1915. Castle Rock, Colorado. U.S. Geological Survey Atlas Folio 198.
  3. ^ U.S. Geological Survey. "Geologic Unit: Dawson". Retrieved 2014-12-27.
  4. ^ Johnson, K.R., Reynolds, M.L., Werth, K.W., and Thomasson, J.R. 2003. Overview of the Late Cretaceous, early Paleocene, and early Eocene megafloras of the Denver Basin, Colorado. Rocky Mountain Geology, vol. 38, no. 1, p. 101-120.
  5. ^ Raynolds, R.G. and Johnson, K.R. 2003. Synopsis of the stratigraphy and paleontology of the uppermost Cretaceous and lower Tertiary strata in the Denver Basin, Colorado. Rocky Mountain Geology, vol. 38, no. 1, p. 171-181.