DescriptionHarding lake alaska pollen aln bet sal artem1.png
English: The Alnus/Betula/Salix/Artemisia pollen data samples from Harding Lake, Alaska inland, Near Fairbanks. There was rapid increase of Betula (birch) pollen at Bölling/Alleröd time ca. 15000 - 13500 cal. BP.
Alnus increases afrte 8200 BP.
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