EXTINCT AND EXISTING GLACIERS OF COLORADO 



55 



South Boulder Glacier extended down to a point just below Tol- 

 land (about 8,500 feet) and was at least from 300 to 400 feet in depth 

 as indicated by perched boulders.^ 



All of the gulches on both sides of the range throughout this region 

 which reach the crest of the range were filled with glaciers. Grand 

 Lake is a glacial lake and Gray's Peak, Torrey's Peak and Mount 

 McClellan are glaciated. Large portions of Georgetown and Central 



Fig 3.— Map showing approximate distribution of known existing glaciers in 

 Colorado. 



City Quadrangles are glaciated, but there is but little evidence of it 

 in the Lower Clear Creek area covered by Underhill.^ 



Pike's Peak Region.— This peak stands out in front of the Front 

 Range, not producing as great a mountain mass as the grouped peaks 



■ Ramaley, Francis, "Remarks on Some Northern Colorado Plant Communities with Special Reference 

 to Boulder Park (Tolland, Colorado)," Univ. Colo. Studies, Vol. VII, pp. 234-35. iQio- 



' Marvine, Arch. R., " Report of Arch. R. Marvine, Assistant Geologist Directing the Middle Park Divi- 

 sion," Seventh Ann. Kept. U.S. Geol. and Geog. Sun. Ten., for 1873, pp. 148, iS9. 1874. 



3 Underhill, James, "Areal Geology of the Lower Clear Creek, Colorado," Proc. Colo. Sci. Soc, Vol. 

 VIII, pp. 104-S, 1906; Univ. Colo. Studies, Vol. Ill, p. 265, 1906. 



