Dakota Sandstones of the Moxa Arch and Green River Basin


The Dakota sandstones of the Moxa Arch and surrounding Green River Basin remain attractive targets for exploration in the Rockies. This study evaluates the sequence stratigraphic framework of the Dakota and Muddy formations.

Stratigraphic picks, used to subdivide these formations, were correlated along laterally continuous marker horizons that represent transgressive disconformities or their equivalent flooding surfaces. This produced a time-stratigraphic framework for evaluating the distribution of sandstones and reservoirs. In addition, regional maps illustrate gross and net sandstone distribution, the occurrence of reservoir quality, and reservoir development for the most significant stratigraphic intervals.

This study covers over 18,000 square miles in Utah, Colorado and Wyoming, within which 1,318 wells were correlated, and represents 7 man-years of geologic research.

Study Highlights

  • Study Text and Figures
  • 15 Outcrops Measured
  • 129 Cores Described
  • 1,318 Study Wells
  • 546 Thinsections Examined
  • 2 Field Studies
  • 32 Regional Maps
  • 5 Cross Sections

Location Map

Dakota Sandstones of the Moxa Arch and Green River Basin