BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 Vol. 29, pp. 187-238, PLS. 9-17 JUNE 30, 1918 



POST-GLACIAL UPLIFT OF NOKTHEASTEEN AMEIiICA ^ 



BY HERMAN L. EAIRCIIILD 



{Read in abstract before the Society December 21 , 1917) 



CONTENTS - 



Page 



[ntroduction 187 



Methods of study 189 



Criteria for determination of water levels 190 



Classification and discussion of the criteria 190 



Summit deltas 190 



Discriminative criteria 193 



Glacial waters 193 



Terraces 195 



Initial water plane on deltas 196 



Inferior valley plains 197 



Absence of marine fossils 199 



Absence of shore features 199 



Variation of beach altitude 200 



The map 201 



Relation of land uplift to ice recession 205 



Change in ocean level 205 



Tabulation and description of new data 207 



General discussion 207 



Hudson-Champlain Valley 208 



Western New England 208 



Maine 210 



Upper Saint Lawrence and Ottawa valleys 214 



Lower Saint Lawrence and Gaspe Peninsula 215 



New Brunswick 220 



Nova Scotia 222 



Labrador and Newfoundland 22G 



Bibliography 229 



Introduction 



For over half a ccntur}^ the certainty of some poat-Glacial submero-eiicc 

 of northeastern America has been recognized, yet the maximum submer- 



Manuscript received by the Secretary of the Society January 14, lOlS. 



XV— Bull. Geol. Soc. Am., Vol. 20, 1917 ' (187) 





JAN21 '919 



'^•'n' 





