Parnell Dome (Discarded)

Part of the La Salle Anticlinorium

Location

Eastern De Witt County (E-6)

References

Heigold et al. 1964, Howard 1964, Clegg 1972, Treworgy 1978

Description

The Parnell Dome structure is sometimes mapped as part of the Downs Anticline. The dome is roughly L-shaped with the legs extending west and south-southeast. Clegg (1972) showed about 40 feet (12 m) of closure on the Danville Coal Member (Pennsylvanian) and Treworgy (1978) mapped approximately 200 feet (60 m) of closure on the top of Middle Devonian carbonates. The Parnell Oil Field, developed on the structure, has produced more than 261,000 barrels of oil from the Valmeyeran Sonora Sandstone and Middle Devonian limestone.