Reports

A Revised Chronology for Mississippi River Subdeltas

Science  20 Sep 1996:
Vol. 273, Issue 5282, pp. 1693-1696
DOI: 10.1126/science.273.5282.1693

Abstract

Radiocarbon measurements by accelerator mass spectrometry relating to three of the four late Holocene Mississippi River subdeltas yielded consistent results and were found to differ by up to 2000 carbon-14 years from previously inferred ages. These geological dataare in agreement with archaeological carbon-14 data and stratigraphic ages based on ceramic seriation and were used to develop a revised chronologic framework, which has implications for prehistoric human settlement patterns, coastal evolution and wetland loss, and sequence-stratigraphic interpretations.