TY - RPRT TI - Heavy-mineral concentrations associated with some gamma-ray aeroradiometric anomalies over Cretaceous sediments in North Carolina; implications for locating placer mineral deposits near the fall zone AU - A. E. Grosz AU - F. C. San Juan AU - J.C. Reid PY - 1992 DO - 10.3133/ofr92396 UR - https://pubs.usgs.gov/publication/ofr92396 ID - ofr92396 ER -