44 UNIVERSITY OF COLORADO STUDIES 



King's Survey of the Fortieth Parallel, Vol. I, pp. 467, 486, PI. V. 



"jth, 8th, and gth Annual Reports, Haydcn Survey (1873, 1874, 1875). 



Hayden's Geological and Geographical Atlas of Colorado, Sheets No. 12, 13, 15, and 16. 



"Pike's Peak Folio," No. 7, Geological Atlas, U. S. Geol. Sur., p. 5. 



"Ten Mile District Folio," No. 48, Geol. Atlas, U. S. Geol. Sur., p. 2. 



"Telluride Folio," No. 57, Geol. Atlas, U. S. Geol. Sur., pp. 9, 15. 



"La Plata Folio." No. 60, Geol. Atlas, U. S. Geol. Sur., p. 6. 



"Silverton Folio," No. 120, Geol. Atlas, U. S. Geol. Sur., p. 24. 



"Geology of Rico Mountains," 2ist Ann. Kept., U. S. Geol. Sur., Pt. 2, p. 156. 



"Geology and Mining Industry of Leadville," 2nd Ann. Rept., U. S. Geol. Sur., p. 228; 



Mon. U. S. Geol. Sur., Vol. XII, pp. 30, 128. 

 "Geology of the Denver Basin," Mon. U. S. Geol. Sur., Vol. XXVII, pp. 41, 265, 278. 

 "Geology of the Aspen Mining District," Mon. U. S. Geol. Sur., Vol. XXXI, pp. 244-250. 

 "The Glacial Gravels and Their Associated Deposits" (containing a chapter on the 



extinct glaciers of Colorado), Mon. U. S. Geol. Sur., Vol. XXXIV, pp. 338-355. 

 "The Mountains of Colorado," American Naturalist, Vol. VI, pp. 65-75. 

 "Glaciers in the Rocky Mountains," American Naturalist, Vol. VI, p. 310. 

 "The Twin Lakes Glaciated Area, Colorado," Journal of Geology, Vol. XIII, pp. 285-312. 



(Refers to paper by Professor Davis in Appalachia, November, 1904, w^hich the 



writer has not examined.) 

 "Pleistocene Geology of the Sawatch Range, near Leadville," Journal of Geology, Vol. 



XII, pp. 698-706. 

 "The Las Animas Glacier," Journal of Geology, Vol. I, pp. 471-475. 

 "Extinct Glaciers of the San Juan Mountains," Proc. Colo. Sci. Soc, Vol. I, pp. 39-46; 



American Journal of Science, Vol. XXVII, pp. 391-396. 

 "Arapahoe Glacier," Journal of Geology, Vol. VIII, p. 647; Vol. X, p. 839; Vol. XII, 



p. 30. 

 "Hallett Glacier," Science, Vol. X, p. 153. 



