NIAGARA FALLS AND VICINITY 26l 



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 considered as evidence of pre-glacial continental elevation and of depres- 

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Altitude as the cause of the glacial period. Science. 22:75, /6- 1893. 



Estimates of geologic time. Am. jour. sci. 3d ser. 45:209-20'; Sci. 



Am. sup. 35:14 403-5- 1893. 



Epeirogenic movements associated with glaciation. Am. jour. sci. 



3d ser. 46:114-21. 1893. 



Wave-like progress of an epeirogenic uplift. Jour, of geol. 2:383-95. 



1894. 



The Niagara gorge as a measure of the post-glacial period. Am. 



geol. 14:62-64. 1894. 



Stages of recession of the North American ice sheet, shown by 



glacial lakes. Am. geol. 15:396-99. 1895. 



Departure of the ice sheet from the Laurentian lakes. Abstract, 



Geol. soc. am. Bui. 6:21-27. 1895. 



Late glacial or Champlain subsidence and reelevation of the St 



Lawrence river basin. Am. jour. sci. 3d ser. 49:1-18, with map. 



1895; Minn. geol. and nat. hist. sur. 23d an. rep't, p. 156-93. 1895. 



Beaches of Lakes Warren and Algonquin. Am. geol. 17:400-2. 1896. 



Origin and age of the Laurentian lakes and of Niagara falls. Am. 



"geol. 18:169-77, fig. 1. 1896. 



- Niagara gorge and Saint Davids channel. Geol. soc. Am. Bui. 



9:101-10. 1898. 

 Walker, A. E. Hamilton sponges [Ontario]. Hamilton ass'n. Jour, and 



proc. no. 11, p. 85-87. 1895. 

 Weller, Stuart. The Silurian fauna interpreted on the epicontinental basis. 



Jour. geol. 6:692-703, 2 fig. 1898. 



Paleontology of the Niagaran limestone in the Chicago area. The 



Crinoidea. Chicago acad. of sci. The natural history survey. . . Bui. 

 4. pt 1. 1900. 



Westgate, Lewis G. Geographic development of the eastern part of the 



Mississippi drainage system. Am. geol. 11:245-60; Abstract, Jour, of 



geol. 1:420, 421. 1893. 

 Winchell, Alexander N. Age of the Great lakes of North America. Am. 



geol. 19:336-39- 1897. 

 Woodward, It. S. On the rate of recession of the Niagara falls, as shown 



by the results of a recent survey. Am. ass'n adv. sci. Proc. 35 :2i22. 



1886. 

 Worthen, A. H. Remarks on the relative age of the Niagara and so-called 



Lower Helderberg groups. Am. ass'n adv. sci. Proc. 19:172-75. 



1870. 

 Wright, G. F. Niagara river and the glacial period. Am. jour. sci. 



28:33-35. 1884. 



The ice age in North America. Appleton. 1889. 



