Early Deglaciation of the Labrador Shelf

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Science  15 Dec 1978:
Vol. 202, Issue 4373, pp. 1181-1183
DOI: 10.1126/science.202.4373.1181


Two marine sediment cores from a basin on the southeastern Labrador Shelf penetrate a mud sequence extending back to 21,000 carbon-14 years before the present (B.P.). The benthic foraminifera are dominated by subartic nearshore species indicative of ice-free summer waters. The pollen record indicates the presence of a sedge-shrub tundra in eastern Labrador as early as 21,000 years B.P. Both sources of evidence suggest less extensive continental ice than has previously been reported for this subarctic region.