TY - RPRT TI - Geochronology and petrogenesis of MORB from the Juan de Fuca and Gorda ridges by 238U230Th disequilibrium AU - S.J. Goldstein AU - M.T. Murrell AU - D.R. Janecky AU - J.R. Delaney AU - D.A. Clague PY - 1991 UR - https://pubs.usgs.gov/publication/70016486 ID - 70016486 ER -