This is a geologic sample in one of the Bureau of Economic Geology's three Core Research Centers. Top Depth: 4240 Ft. Bottom Depth: 4890 Ft. lease_name: SUNVOLD OUTCROPS sample_type_name: PALEONTOLOGY/PALYNOLOGY SAMPLES sample_category_name: Miscellaneous formation_name: Unknown formation_age_name: Unknown facility_name: Houston reservoir_name: SUNVOLD operator_name: ARCO OIL & GAS state_name: North Dakota county_name: Sheridan