The Tip Top field of western Wyoming has two wells producing oil from the Nugget sandstone Jurassic age and several outlying shut-in gas wells capable of production from the Cretaceous Frontier formation. Daily oil production amounts to approximately 300 barrels from a depth of 10,000 feet. Gas wells have an average capacity of 2,000,000 cubic feet per day in the 7,000-foot depth range.

Oil is trapped in the upper fractured part of the Nugget sandstone on the upthrown side of a thrust fault. Frontier formation gas production is localized in both upthrown and downthrown fault blocks on the anticlinal fold.

Low pressure-high volume gas is produced in the Tip Top Shallow and Big Piney gas fields from lenticular sandstones in the Tertiary Wasatch formation.

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