322 REPORT UNITED STATES GEOLOGICAL SURVEY. 



Such sections and other illustrations have been executed to accompany 

 the report as are deemed of use in the clearer exposition of the facts in 

 relation to the geology therein cited. And in such cases where I have 

 had occasion to incorporate with my own the observations of others, in 

 order to give to these accumulated results an approach to a connected 

 completeness, due credit has in all instances been given in the proper 

 jplace. 



To the gentlemen of the survey, and especially to my colleagues of 

 the geological corps, I am under obhgations for many courtesies and 

 cordial co-operation in the work of the ofBce. In this connection I wish 

 to express my appreciation of the many personal acts of kindness which 

 I shared with members of our little party in the field. 



I am, sir, very respectfully, your obedient servant, 



OEESTES ST. JOHK. 



Dr. F. V. Hatden, 



United States Geologist in Charge. 



