The Cordilleran Hingeline transects central Utah from the north central part of Utah to the southwest corner of the State.

The hinge area between the shelf and miogeosyncline of the Cordilleran geosyncline controlled deposition and erosion of sediments ranging in age from Cambrian through Early Triassic.

Facies changes occur in the Paleozoic and early Mesozoic. Superimposed on the stratigraphic changes are the major thrusts of the Sevier and Laramide orogenies.

Structures similar to those along the thrusts in northern Utah and southwestern Wyoming exist along the leading edges of the thrusts in the Hingeline area.

The gravity method works very well in this area due to a major increase in the density of the sediments, between the overlying Mesozoic and the underlying Triassic and Paleozoic section.

The gravity control was acquired using high standards of accuracy for the surveying and the recording of gravity.

Elevation loops tied within a maximum of one foot, which was then prorated out. Gravity values are accurate to approximately 0.04 milligals. A suitable grid of data was accomplished.

There are over 23,000 gravity stations in the central Utah portion.

Area A contains about 3346 gravity stations and Area B consists of about 3594 gravity stations.