Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleSeven thousand year duration for a geomagnetic excursion constrained by <sup>230</sup>Th<sub> xs</sub>.AuthorsKnudsen, Mads Faurschou; Henderson, Gideon M.; Mac Niocaill, Conall; West, A. JoshuaPublicationGeophysical Research Letters, 2007, Vol 34, Issue 22, pn/aISSN0094-8276Publication typeArticleDOI10.1029/2007GL031090