The Sugarland Dome was discovered by torsion balance of NAMEX-SEISMOS in 1927. J.F. Weinzierl writes in Oil Weekly (Texas) on 2.9.27: Armed with this experience, such companies als the North American Exploration Company come out and make statements to the effect that deep salt domes and structures can be found on the Gulf Coast at greater depths than the seismograph or the geophone... - with the torsion balance...