This is a geologic sample in one of the Bureau of Economic Geology's three Core Research Centers. API Number: 420031091400 Top Depth: 3800 Ft. Bottom Depth: 4800 Ft. lease_name: HOLT, O B sample_type_name: CUTTINGS sample_category_name: Cuttings formation_name: Unknown formation_age_name: Unknown facility_name: Houston reservoir_name: COWDEN N operator_name: ENDEAVOR ENERGY RESOURCES L.P. state_name: Texas county_name: Andrews