Reviews. 



Fourteenth Annual Report of the New York State Geologist for 18Q4. 

 James Hall, State Geologist. 



This volume of 669 pages, besides containing the short report of 

 the state geologist giving an account of the work done under his direc- 

 tion, embraces several valuable papers upon the geology and palaeon- 

 tology of New York state. The brief reviews of these papers here 

 given are taken largely from those written by the state geologist and 

 printed in his report at the beginning of the volume. 



1. A Preliminary Description of the Faulted Region of Herkimer, Ful- 

 ton, Montgomery, and Saratoga Counties. By N. H. Darton, pp. 31-56, 

 Pis. I-1X, Figs. 1-12. 



The field work upon which this paper is based was done in connec- 

 tion with the preparation of the geological map of the state. It 

 describes in detail a region of country which was originally described 

 by Vanuxem in his report on the geology of the Third District. It 

 gives an account of the general relations of the faults, and describes 

 in detail those at Little Falls, on the East Canada Creek, St. Johnsville, 

 the Noses, Fonda, Tribes Hill, Broadalbin, Hoffman's Ferry, Saratoga, 

 and Lake George. 



The region is a general monocline with sediments of slightly vary- 

 ing dip, and the faults traversing this monocline, accompanied by 

 certain features of local disturbance, have considerably modified its 

 regularity. As a rule, these displacements do not make conspicuous 

 features in the topography, but one of them, at Little Falls, gives rise 

 to one of the most striking features in the scenery of the Mohawk 

 valley. 



2. Report on the Structural and Economic Geology of Seneca County. 

 By D. F. Lincoln, M.D., pp. 57-125, Pis. I-XIX, Figs. 1-30. 



The subject treated in this paper is covered under three general 

 divisions: (1) surface geology; (2) stratigraphic geology; (3) eco- 



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