This is a geologic sample in one of the Bureau of Economic Geology's three Core Research Centers. API Number: 210553951101 Top Depth: 1580 Ft. Bottom Depth: 3940 Ft. lease_name: STATE UNION "AG" sample_type_name: CUTTINGS sample_category_name: Cuttings formation_name: Unknown formation_age_name: Unknown facility_name: Houston reservoir_name: UNION 29-26N-9W operator_name: UNKNOWN state_name: Michigan county_name: Grand Traverse