Publications - Occasional Papers

Radiocarbon Date List IX: Antarctica, Arctic Ocean, and the Northern North Atlantic

INSTAAR Occasional Paper 54

2000, 138 pp. (cost: $10)

This Date List contains an annotated listing of 385 radiocarbon dates determined on samples from the marine environments of Antarctic, Arctic Ocean, northern North Atlantic, Icelandic Lakes, and Colorado. Samples were submitted by people affiliated with INSTAAR’s Micropaleontology Lab under the direction of Drs. John T. Andrews and Anne E. Jennings. Nearly all of the dates are from marine cores on acid-insoluble organic material, shells, and foraminifera. All of the dates were obtained by the Accelerator Mass Spectrometry (AMS) method. Regions of concentrated research include: the Ross Sea, the Weddell Sea, the Beaufort Sea, Hudson Strait, Baffin Bay, the Labrador Shelf and Sea, East Greenland fjords and shelf, the Denmark Strait, Iceland Plateau, the southwestern and northwestern Iceland Shelves. The three non-marine radiocarbon dates are from lake sediments in Iceland and on a gastropod from an outcrop in Colorado. The radiocarbon dates have been used to address a variety of research questions including timing of the environmental changes including glacier advance and retreat, the appropriateness of commonly adopted marine reservoir corrections, and testing the validity of acid- insoluble organic dates for Antarctica. Thus, most of the dates constrain the timing, rate, and interaction of late Quaternary paleoenvironmental fluctuations in sea level, glacier extent, sediment input, and changes in ocean circulation patterns. Stratigraphic and sample contexts are presented for each core to document the basis for interpretations.

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