New York State Museum Bulletin 



Entered as second-class matter November 27, 1915, at the Post Office at Albany, New York 

 mider the act of August 24, 19 12 



Published monthly by The University of the State of New York 



Nos. 209, 210 ALBANY, N. Y. May-June 191S 



The University of the State of New York 

 New York State Museum 



John M. Clark, Director 



PLEISTOCENE MARINE SUBMERGENCE OF THE HUD- 

 SON, CHAMPLAIN AND ST LAWRENCE VALLEYS 



BY HERMAN L. FAIRCBILD 



INTRODUCTION 



This is the closing paper of a series on the glacial waters in New- 

 York State published as bulletins oif the New York State Museum. 

 These bulletins, with other papers, described the successive stages 

 of the glacial lakes and drainage down to the time of Lake Iroquois,, 

 the latest of the glacial lakes. (See nos. 154-64 of the biblio- 

 graphic list.) 



The glacial history had been carried eastward through the 

 Mohawk valley to the Hudson valley, and the iwriter thought that 

 his task would be completed when the Lake Iroquois history ended 

 with the extinction of the lake in the " Champlain sea." In the 

 prosecution of this study the Iroquois shore was traced north- 

 eastward on the northwest flank of the Adirondack highland to the- 

 second and final outlet of the lake, at the pass south of Covey hill' 

 on the international boundary, with altitude far over 1000 feet. 



It was expected that the waters inferior to Iroquois in the 

 Ontario-St Lawrence basin would correlate with Woodworth's 

 water levels in the Champlain valley (81, 82). But a complication- 

 appeared when shore-line features were found in the St Lawrence 

 valley at altitudes beneath the Iroquois plane but much above the 

 supposed marine plane, and even above Woodworth's "Lake Ver- 

 mont." These beaches were first noted by Prof. G. H. Chadwick, 

 in the Canton district. The first tentative explanation of these 



