Gilsonite is a solid hydrocarbon that forms a swarm of subparallel, northwest-trending, near-vertical, laterally and vertically extensive veins in the Uinta Basin of Utah and Colorado. The Uinta Basin hosts the world’s largest deposits of gilsonite and is the only place where gilsonite is economically produced in large quantities.

The goal of the Utah Geological Survey study was to generate a map of the gilsonite veins, collect vein attribute data, and combine these new data with existing data into an up-to-date compilation of Utah's gilsonite resource. All of the data were compiled into a 1:100,000-scale geologic map and accompanying text, which includes detailed descriptions of the character of the gilsonite deposit for each vein, and evidence of mining and prospecting.

50 pages + 1 plate