Site map showing locations of samples that were reanalyzed (stars), and several other previously published locales (circles): Crawfish Inlet (Alaska; Addison et al., 2010), Nordan's Pond Bog (Newfoundland; Pyne-O'Donnell et al., 2012), and sites S1 and S2, two examples of a more comprehensive list of sites in Europe from Lawson et al. (2012). Est.—estimate; NGRIP—North Greenland Ice Core Project; NEEM—North Greenland Eemian Ice Drilling; QUB—Queen's University Belfast; JAM—Jardelunder Moor; DOM—Dosenmoor. The lack of sites between proximal samples and eastern Canada reflects the absence of cryptotephra studies in this region.
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