Niagara Falls 



1897 falling on the northern and eastern shores, or both. Mr. Gilbert presents 



Gilbert a plan for more precise measurement and more detailed investigation, and 



supplements his article with a digest of a cognate investigation by E. L. 

 Moseley of the region north of Sandusky bay, the data in question being 

 in accord with the results obtained by Mr. Gilbert in his own investigation. 

 It was an abstract of this article which was communicated to the 

 American Association for the Advancement of Science at the Detroit 

 meeting in August, 1897, and a fuller abstract was printed in the National 

 Geographic Magazine for September, 1897. 



1897 UPHAM, WARREN. Niagara gorge and St. David's channel. (Geol. 



Upham s oc . f Am. bul. Jan. 25, 1898. 9:101-110.) 



This paper, which was read before the society December 30, 1897, 

 takes up in detail: I. Niagara gorge (physical features in general, from 

 Lewiston to the whirlpool, the whirlpool rapids. From the rapids to 

 the Falls). II. Saint David's channel. (From St. David's to the whirl- 

 pool. Probable preglacial extent above the whirlpool. Effects of the 

 recession of the Falls.) III. Effect of the Laurentian glacial lakes on 

 the Niagara gorge erosion. (Glacial lakes above Niagara river. Glacial 

 lakes below Niagara river.) IV. Epeirogenic uplifting contemporaneous 

 with the glacial lakes. V. Epeirogenic movement continued to the present 

 time. Duration of Niagara Falls and the Postglacial period. In his 

 summing up the author rejects Spencer's computation of 32,000 years as 

 the age of the Niagara river, and agrees with Gilbert's conclusion of 7,000 

 years as announced at the Buffalo meeting of the A. A. A. S. in 1 886. 



1898 



1898 (The) Age of Niagara Falls. (Nature, Nov., 1898. 59:16.) 



The age of Niagara Falls estimated at 10,000 years as a result of 

 investigations by Professor Frederick Wright into the erosion at the mouth 

 of the gorge. 



Light on the age of Niagara. (Pub. opin., Oct. 20, 1898. 25:496.) 

 From Science, October 1 4. 



Merrill 



1898 Merrill, Frederick J. H. A guide to the study of the geological 



collections of the New York state museum. (Bul. of the N. Y. state 

 museum. Nov., 1898. 4: No. 19. Albany: 1898. See index.) 



Contains scattered information concerning the rock formations at Niagara. 



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