4 PROCEEDINGS OF THE DENVER MEETING 



Fourth day (August 19). The party went from Grand Junction to Ouray. The 

 route is along the great mesa plains of the Colorado basin. The horizontal Meso- 

 zoic and Tertiary beds extended all the way from Grand Junction to the San Juan 

 mountains at Ouray. Arriving at Ouray at 3.30 p m, a drive was taken up the 

 beautiful Red Mountain stage road, affording fine views of the precipitous Red 

 Mountain canyon. Along the road is exposed a good section of Algonkian quartz- 

 ites and slates. 



Fifth day (August 20). The entire day was spent in visiting the Camp Bird mine 

 and mill, several miles south of Ouray. The Camp Bird mine is a great fissure 

 vein in Tertiary andesitic breccias, and it afforded the first good opportunity for 

 the party to study the ore deposits of the San Juan district. 



Sixth day (August 21). The party divided, a part going by train from Ouray to 

 Telluride, and a part over the beautiful Virginius pass, 13,000 feet high. This ride 

 furnished a fine opportunity for studying the glacial cirques of the San Juan dis- 

 trict, and also allowed those interested in ore deposits to visit the Virginius and 

 Liberty Bell mines. 



Seventh day (August 22). The day was spent at Telluride and vicinity. About 

 half of the party studied the glacial and physiographic features of the vicinity, 

 taking a carriage ride to the Alta mine, 10 miles southwest of Telluride, and the 

 other half examined the Smuggler Union and Tomboy mines. The district was of 

 interest to all from a structural point of view. The Triassic beds are finely ex-, 

 posed, and the unconformity at the base of the San Miguel conglomerate, which 

 underlies the volcanics, is clearly marked. 



Eighth day (August 23). From Telluride to Silverton. The party again divided, 

 some going by train via Rico and Durango, while a number rode from Telluride 

 to Red Mountain, over the Ingram pass, 12,700 feet, and thence by train to Silver- 

 ton. Those on horseback had an opportunity to observe the red mountains of 

 the district, called "blow outs " by the miners. 



Ninth day (August 24). The division of the party interested in ore deposits 

 studied the Silver Lake and Royal Tiger mines. Another division of the party 

 walked down the Las Animas canyon from Silverton to Needleton, 15 miles, in 

 order to study the Algonkian and Archean rocks and their relations. Both of these 

 series are magnificently exposed in this canyon. 



Tenth day (August 25). En route from Silverton to Denver via Durango, An- 

 tonito, Alamosa, and Pueblo. The entire Mesozoic-Paleozoic-pre-Cambrian suc- 

 cession of southwestern Colorado is exposed along the railroad from Silverton to 

 Durango. From Durango for a considerable distance the train passed over gently 

 dipping Cretaceous rocks. At Toltec gorge the Archean was seen for the last time, 

 and from Toltec gorge to the San Luis valley a recent volcanic plateau was traversed. 



The party arrived at Denver the morning of the eleventh day, August 26, having 

 traveled almost 1,400 miles. 



As far as Grand Junction the railroad is standard gauge, and for this distance the 

 party had a special Pullman sleeper. From Grand Junction to Alamosa the road is 

 narrow gauge, and during this part of the excursion there was no night traveling. 

 Over this part the Denver and Rio Grande railway placed at our disposal a special 

 day coach. From Alamosa to Denver a special sleeper was again available. 



Everywhere the party was treated by the citizens of Colorado as distinguished 

 guests, and the best that the various places aflorded was at their disposal. The 

 mine owners, superintendents, and engineers at each mine visited gave their time 



