This is a geologic sample in one of the Bureau of Economic Geology's three Core Research Centers. API Number: 210792901600 Top Depth: 2750 Ft. Bottom Depth: 4200 Ft. lease_name: STATE KALKASKA /D/ sample_type_name: CUTTINGS sample_category_name: Cuttings formation_name: Unknown formation_age_name: Unknown facility_name: Houston reservoir_name: KALKASKA 13-27N8W operator_name: UNKNOWN state_name: Michigan county_name: Kalkaska