56 UNIVERSITY OF COLORADO STUDIES 



of other parts of Colorado, and hence was not as favorably situated for 

 the production of large glaciers. However, some reached a length of 

 at least three or four miles. ^ Moraine Lake and Seven Lakes are of 

 glacial origin. Cross^ considered the rounded boulder and gravel 

 deposits of the smooth, grassy country about Divide and Summit 

 glacial drift. 



Northern Part of Park Range. — King^ maps the glaciated area of 

 this northern region on a small scale, and says that it is about 60 miles 

 in length, with an average width of 10 miles. The glaciers came down 

 to the level of North Park, ending at 7,600 or 8,000 feet, portions of 

 the foothills being composed of morainal deposits. 



White River Region. — Endlich'' found no evidence of glaciation in 

 the White River drainage, but believed there were glaciers on the 

 Grand River side of the White River Plateau. I found abundant 

 evidence of glaciers in the upper part of the North White River Valley 

 down as far as Buford, and on Marvine Creek, and have reason to 

 beHeve the same would be found true of the South Fork.^ 



Leadville District. — The entire region about Leadville including 

 the northern part of Park Range, Sawatch (Saguache) Range, Mos- 

 quito Range, Elk Mountains, Upper Arkansas Valley, Blue River, 

 Eagle River etc., is heavily glaciated. The region, especially the 

 Upper Arkansas Glacier, has been much discussed, and its tributary, 

 Lake Creek (Twin Lakes area), has become classic ground to glacial- 

 ists.^ Capps and Leffingwell examined 250 square miles of glaciation 



' Stone, George H., "Remarks on the Glaciation of the Rocky Mountains," U.S. Geol. Surv., Hon., 

 Vol. XXXIV, pp. 348-49. 1899. 



" Cross, Whitsian, Pike's Peak Folio, No. 7, Geologic Atlas of the United States, U.S. Geol. Surv., p. 5, 

 1894. 



3 King, Clarence, " Systematic Geology," U.S. Geol. Surv. 40th Parallel, Vol. I, p. 468, Plate V. 



< Enduch, F. M., "Report on the Geology of the White River District," Tenth Ann. Kept. U.S. Geol. 

 and Geog. Surv. Terr., for 1876, p. 86, 1878. 



s Henderson, Junius, " Scientific Expedition to Northwestern Colorado in 1909; Itinerary, Topography 

 and Geology," Univ. Colo. Studies, Vol. VII, pp. iio-ii, 1910. 



« Hayden, F. v., "Report of F. V. Hayden, U.S. Geologist," Seventh Ann. Kept, of U.S. Geol. and Geog. 

 Surv. Terr., for 1873, pp. 48-54, 1874; "Report of F. V. Hayden, United States Geologist," Eighth Ann. Rept. 

 U.S. Geol. and Geog. Surv. Terr., for 1874, pp. 47-68, 1876; Emmons, S. F., "Geology and Mining Industry 

 of Leadville, Colorado," U.S. Geol. Surv., Hon., Vol. XII, pp. 40-42. 1886; Tenmile Folio, No. 48, Geologic 

 Atlas of the United States, U.S. Geol. Surv., p. 2, 1898; Geology of the Aspen Mining District, U.S. Geol. Surv., 

 Mon., Vol. XXXI, pp. 244-47, 1898; Emmons, S. F., and Irving, John D., The Downtown District of Leadville, 

 Colorado, U.S. Geol. Surv., Bull. No. 320, 1907; Stone, George H., "Remarks on the Glaciation of the Rocky 



