TY - RPRT TI - Berriasian (Early Cretaceous) radiometric ages from the Grindstone Creek Section, Sacramento Valley, California AU - T.J. Bralower AU - K.R. Ludwig AU - J. D. Obradovich PY - 1990 DO - 10.1016/0012-821x(90)90088-f UR - https://pubs.usgs.gov/publication/70016224 ID - 70016224 ER -