Early Holocene and Late-glacial Eruption Frequency Peaks in the Grímsvötn and Bárdarbunga Volcanic Systems Revealed by Tephrochronology.

Esther Ruth Gudmundsdottir1, Gudrun Larsen2, Olafur Ingolfsson1, Svante Bjorck3 and Jon Eiriksson4, (1)University of Iceland, Institute of Earth Sciences, Reykjavik, Iceland, (2)University of Iceland, Nordic Volcanological Center, Institute of Earth Sciences, Reykjavik, Iceland, (3)Geobiosphere Sci Ctr, Lund, Sweden, (4)University of Iceland, Reykjavik, Iceland