This is a log from an oil or gas well in the Bureau of Economic Geology's Geophysical Log Facility. API Number: 4205700000 lease_name: STATE TRACT 40 reservoir_name: Unknown operator_name: C. G. GLASSCOCK-TIDELANDS OIL CO.& SOUTHERN MINERA log_source_name: RRC datum_name: Unknown state_name: Texas county_name: Calhoun