Figure 12. Conclusions from drilling.

• Structural geometries similar to northern Utah thrust belt

• Jurassic Twin Creek and Navajo reservoirs

• No marine Cretaceous source rocks in subthrust position

• What was source of oil and gas shows?

  • Jurassic Arapien Shale

  • Permian Park City-Phosphoria Formation

  • Permian Toroweap Formation

  • Mississippian strata

As the result of Placid’s drilling program and wells drilled by other operators, we could not demonstrate marine Cretaceous source rocks in a subthrust position. Placid began investigating other possible source rocks in Mississippian, Permian, and Jurassic strata.