Provisional geologic map of the Hatch Mesa quadrangle, Grand County, Utah (M-152)

By: J. P. Chitwood

The Hatch Mesa quadrangle is located in Grand County, Utah about 15 miles east of the town of Green River. The quadrangle is traversed by the Book Cliffs escarpment, which marks the boundary between the Uinta Basin and Mancos Shale Lowland sections of the Colorado Plateau physiographic province. The quadrangle overlies the northern part of the ancestral Paradox structural basin, and is between the Uncompahgre uplift to the east and the San Rafael Swell to the west. Northwest-to southeast-trending, normal-faulted, horst blocks in the north part of the quadrangle may have been formed by dissolution and collapse of salt in the underlying Pennsylvanian Paradox Formation. Many faults exposed in the Book Cliffs in the northern part of the quadrangle continue southeast to the salt -cored Salt Valley anticline and are subparallel with faults in Precambrian basement rocks. The northwest-plunging Courthouse syncline enters the quadrangle from the southeast.

Other Information:
Published: 1994
Pages: 16 p.
Plates: 2 pl.
Scale: 1:24,000
Location: Grand County
Media Type: Paper Map