L PROCEEDINGS OF THE DENVER MEETING 



Edward Martin Shepard, A. M., Springfield, Mo. Professor of Geology, Drury 



College. 

 William John Sutton, B. S., E. M., Victoria, B. C. Geologist to E. and N. 



Railway Company. 

 Alexander Newton Winchell, M. S., Butte, Mont. Professor of Geology and 



Mineralogy, Montana State School of Mines. 



The reading of papers was declared in order. The first paper pre- 

 sented was 



HYDROGRAPHIC HISTORY OF SOUTH DAKOTA 

 BY J. E. TODD 



The paper was discussed by S. F. Emmons, H. T. Fuller, A. C. Lawson, 

 and the author. It will be printed in this volume. 



At the close of the discussion of Professor Todd's paper a recess was 

 voted in order to allow attendance at the opening general session of the 

 American Association for the Advancement of Science. The Society- 

 reconvened at 10.25 o'clock. 



It was announced by the Secretary that the American Association for 

 the Advancement of Science had adopted an amendment to its consti- 

 tution under which societies affiliated with the Association were to be 

 represented by delegates on the Council of the Association, and that the 

 Geological Society was entitled to two such delegates. 



Vice-President S. F. Emmons moved that the President and Secretary 

 of the Society be ex officio the delegates, and it was so voted. 



The reading of papers was resumed, and the first paper was an in- 

 formal presentation of the following account of the 



GEOLOGICAL EXCURSION IN COLORADO 

 BY C. R. VAN HISE 



It has long appeared to me that the most important services to geology which a 

 summer meeting of geologists can accomplish are a common study of the phe- 

 nomena of geology in the field and a mutual exchange of views. For a compari- 

 son of views no other place is so well adapted as the field. Having held these 

 opinions for a number of years, I planned an excursion in the Lake Superior region 

 at the time of the meeting of the American Association for the Advancement of 

 Science, at Madison, Wisconsin, in 1893. This excursion was attended by about 

 thirty geologists. It continued for a week, and during that time two of the more 

 important iron-bearing districts and the copper-bearing district of Keweenaw point 

 were visited. The evident pleasure and profit of those taking part in the Lake Supe- 

 rior excursion encouraged me to suggest a Colorado excursion preceding the meeting 

 of the American Association for the Advancement of Science and the Geological 

 Society of America at Denver. I presented the subject to Messrs S. F. Emmons 



