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ANNUAL EEPORT SMITHSONIAN INSTITUTION, 19 2 8 



but it was along the Angerman River that Liden himself, quite inde- 

 pendently, succeeded in finding and working out practically the 

 whole of the post-glacial varve succession by a careful and painstak- 

 ing correlation of a long series of sections, giving the total length 

 of the post-glacial epoch as about 8,700 years. Wliat made his work 

 especially important is that there seems to be no other place in the 

 world, not even in Sweden, where there is a possibility of finding 



such a continuous varve series for the whole of the post-glacial 

 epoch. By the dating of the lowest varves the recession of the ice in 

 Sweden has been determined in detail at more than 1,500 points, 

 while elsewhere, excepting in Finland and in Canada between Ontario 

 and Quebec, sections have rarely been worked out to the lowest 

 varve. Thus, along the Connecticut Valley, according to Antevs' 

 exceedingly interesting and comprehensive measurements, the lowest 



