Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

West-east stratigraphic transect of Cretaceous rocks - Southwestern Montana to western Minnesota

Conference · · AAPG Bulletin (American Association of Petroleum Geologists); (United States)
OSTI ID:5739852
; ;  [1];  [2];  [3];  [4];  [5];  [6]; ;
  1. Geological Survey, Denver, CO (United States)
  2. North Dakota Geological Survey, Bismark (United States)
  3. South Dakota School of Mines, Rapid City (United States)
  4. South Dakota Geological Survey, Vermillion (United States)
  5. Minnesota Geological Survey, St. Paul (United States)
  6. St. Cloud State Univ., MN (United States)
+ Show Author Affiliations

In Montana, North and South Dakota, and Minnesota, Cretaceous strata of the Western Interior foreland basin are preserved today in Laramide structural and cratonic basins. The Western Interior basin was asymmetric: more than 17,000 ft of strata are present in southwestern Montana, less than 1,000 ft in eastern South Dakota. Asymmetry resulted from varying rates of subsidence owing to tectonic and sediment loading. Cretaceous rocks consist primarily of sandstone, siltstone, claystone, and shale. Conglomerate is abundant along the western margin, whereas limestone is generally restricted to the eastern shelf. Sediment was deposited in both marine and nonmarine environments as the shoreline fluctuated during major tectonic and eustatic cycles. A west-east transect of the Cretaceous System from southwestern to east-central Montana, the Black Hills and Williston basin, and eastern South Dakota and western Minnesota include regional facies relations, sequence boundaries, and biostratigraphic and radiometric correlations. More than 17,000 ft of Cretaceous strata in southwestern Montana typify thick nonmarine facies of the rapidly subsiding westernmost part of the basin.

OSTI ID:
5739852
Report Number(s):
CONF-910403--
Journal Information:
AAPG Bulletin (American Association of Petroleum Geologists); (United States), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Vol. 75:3; ISSN AABUD; ISSN 0149-1423
Country of Publication:
United States
Language:
English

Similar Records

West-east stratigraphic transect of Cretaceous rocks - Southwestern Montana to western Minnesota
Conference · Sat Jun 01 00:00:00 EDT 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States) · OSTI ID:6130115
West-east stratigraphic cross section of Cretaceous rocks, central Rocky Mountains to east-central Great Plains, Utah, Colorado, and Kansas
Conference · Thu Feb 28 23:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States) · OSTI ID:5617983
The Cretaceous record in a northeast-trending transect, northern Utah to east-central Wyoming
Conference · Thu Feb 28 23:00:00 EST 1991 · AAPG Bulletin (American Association of Petroleum Geologists); (United States) · OSTI ID:7259897

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
CRETACEOUS PERIOD
DEVELOPED COUNTRIES
FEDERAL REGION VIII
GEOLOGIC AGES
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
GEOLOGY
LITHOLOGY
MESOZOIC ERA
MINNESOTA
MONTANA
NORTH AMERICA
NORTH DAKOTA
ROCKS
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
SOUTH DAKOTA
STRATIGRAPHY
USA