• 230Th-234U and 14C Ages Obtained by Mass Spectrometry on Corals

      Bard, Edouard; Arnold, Maurice; Fairbanks, Richard G.; Hamelin, Bruno (Department of Geosciences, The University of Arizona, 1993-01-01)
    • Intra-Annual Variability of the Radiocarbon Content of Corals from the Galapagos Islands

      Brown, T. A.; Farwell, G. W.; Grootes, P. M.; Schmidt, F. H.; Stuiver, Minze (Department of Geosciences, The University of Arizona, 1993-01-01)
      We report AMS 14C measurements on subannual samples of coral from the Galapagos Islands that span the period, 1970-1973. Both the major 1972 El Niño/Southern Oscillation event and intra-annual changes in regional upwelling of 14C-depleted waters associated with alternation of surface-ocean current patterns are evident in the record. Our data show that the corals preserve a detailed record of past intra-annual variations of the 14C content of surface ocean water.
    • University of Miami Radiocarbon Dates XIX

      Johnson, R. A.; Stipp, J. J. (American Journal of Science, 1980-01-01)