NEPHELINE SYENITE IN EASTERN ONTARIO 695 



The third paper was 



NEPHELINE SYENITE IN EASTERN ONTARIO 

 BY FBANK D. ADAMS 



[Abstract] 



The paper presents briefly some of the results of a detailed study of the 

 occurrences of nepheline syenite in the townships of Monmouth, Glamorgan, 

 and Methuen, in the province of Ontario. The character of the various differ- 

 entiation products of the syenite magma are considered and the relation of the 

 group to the granite bathylites and to the intrusive rocks of the region are 

 discussed. 



Eemarks were made by A. C. Lane, E. A. Daly, and the author. 



The fourth paper was 



ORIGIN OF THE SUDBURY ORE BODIES 

 BY ALFEED E. BAELOW* 



The paper was discussed by A. P. Coleman, J. F. Kemp, Eobert Bell, 

 A. C. Lane, and the author. 



The next paper was presented by title : 



BIBLIOGRAPHY OF THE GEOLOGY, MINERALOGY, AND PALEONTOLOGY OF 



BRAZIL 



BY JOHN C. BEANNEB 



The following paper was read : 



GEOLOGIC RECONNAISSANCE MAP OF ALASKA 

 BY ALFEED H. BEOOKS 



[Abstract]^ 



Contents 



Page 



Introduction ' 695 



Stratigraphic subdivisions and their description 696 



Correlation table 698 



Structure 699 



INTEODUCTION 



Though geologic observations in Alaska can be said to have begun with the 

 work of Stellar, the naturalist, who accompanied Bering on his ill-fated voyage 

 in 1741, it is only in the past decade that systematic surveys have been made, 



* Introduced by H. M. Ami. 



t The geologic maps and sections described in this abstract will appear as illustrations 

 to a paper now in preparation entitled "The geography and geology of Alaska ;" profes- 

 sional paper, U. S. Geological Survey, no. 45. 



