Photo of the DayPOTD February 3, 2014: Uinta Basin, Uintah County, UtahUinta Basin, Uintah County, Utah Photographer: Michael Vanden Berg The Mahogany oil shale zone contains the highest percentage of organic material in the Green River Formation, Uinta Basin, Uintah County. February 3, 2014 https://geology.utah.gov/wp-content/uploads/ugs-logo-large.png 0 0 Utah Geological Survey https://geology.utah.gov/wp-content/uploads/ugs-logo-large.png Utah Geological Survey2014-02-03 11:19:262016-08-10 16:40:53POTD February 3, 2014: Uinta Basin, Uintah County, Utah