This is a log from an oil or gas well in the Bureau of Economic Geology's Geophysical Log Facility. API Number: 422113256200 Top Depth: 1600 Ft. Bottom Depth: 7800 Ft. lease_name: LOCKHART 58 reservoir_name: SPARKS (TONKAWA) operator_name: EOG RESOURCES, INC. log_source_name: RRC datum_name: Unknown state_name: Texas county_name: Hemphill