Entries by Utah Geological Survey

POTD June 20, 2017: Fremont petroglyphs.

Fremont petroglyphs Photographer: Charles Bishop © 2017 At the mouth of Cottonwood Canyon, Fremont petroglyphs in the Northern San Rafael Style depict a hunting scene. The figures are etched into sandstone of the Green River Formation, and derive their contrast from the dark, weathered patina developed on the light-colored rock.

POTD May 25, 2017: Bryce Canyon National Park

Bryce Canyon National Park Photographer: Grant Willis © 2017 Bryce Canyon National Park is actually a plateau-edge escarpment carved into the Claron Formation, estimated to be eroding back at the phenomenal rate of as much as 4 feet per century. The orange colors are due to varying amounts of iron oxide minerals that stain calcareous […]

The Gothic Shale of the Pennsylvanian Paradox Formation, Greater Aneth Field (Aneth Unit), Southeastern Utah: Seal for Hydrocarbons and Carbon Dioxide

NEW PUBLICATION The Gothic Shale of the Pennsylvanian Paradox Formation, Greater Aneth Field (Aneth Unit), Southeastern Utah: Seal for Hydrocarbons and Carbon Dioxide By: Jason E. Heath, Thomas A. Dewers, Thomas C. Chidsey, Jr., Stephanie M. Carney, and S. Robert Bereskin Greater Aneth oil field, Utah’s largest oil producer, has produced over 483 million barrels […]

Holocene Surface-Faulting Earthquakes at the Spring Lake and North Creek Sites on the Wasatch Fault Zone: Evidence for Complex rupture of the Nephi Segment

Holocene Surface-Faulting Earthquakes at the Spring Lake and North Creek Sites on the Wasatch Fault Zone: Evidence for Complex rupture of the Nephi Segment By: Christopher B. DuRoss, Michael D. Hylland, Adam I. Hiscock, Stephen F. Personius, Richard W. Briggs, Ryan D. Gold, Gregg S. Beukelman, Greg N. McDonald, Ben A. Erickson, Adam P. McKean, […]