• New Radiocarbon Dates for the Reed Mat from the Cave of the Treasure, Israel

      Aardsma, Gerald E. (Department of Geosciences, The University of Arizona, 2001-01-01)
      Modern radiocarbon dates were procured for the Cave of the Treasure, Israel reed mat at the University of Arizona accelerator mass spectrometry (AMS) laboratory in late 1999 and early 2000. Three samples from various locations on the mat were dated. One of these samples was dated twice, and another was dated three times, yielding a total of six new radiocarbon dates on the mat. The new 14C dates overturn expectations of a late Chalcolithic, roughly 3500 BC, date for the origin of the mat. It is suggested that the mat may not have been of common use but may rather have been a religious heirloom with a history stretching back into the early Chalcolithic.
    • Toward an Absolute Chronology at Elk Lake, Minnesota

      Aardsma, Gerald E. (Department of Geosciences, The University of Arizona, 1996-01-01)
      Radiocarbon measurements on organic carbon from the varved cores of Elk Lake, Minnesota suggest that the varve count may underestimate calendar years by 18% for the most recent 3800 varve years.