[41]. Geology of Canada, 1863, p. 61.
[42]. Safford’s Geology of Tennessee, p. 309.
[43]. Lyell’s Student’s Manual, chap. xxiii.
[44]. Geological Studies, by Prof. A. Winchell, p. 165.
[45]. Geological Studies, pp. 93, 163.
[46]. Powell’s Geology of the Uinta Mountains.
[47]. Geological Exploration of the Fortieth Parallel, vol. ii. p. 456.
[48]. Geological Studies, p. 92; see also Dutton’s Tertiary History of the Cañon District.
[49]. Tertiary History of the Cañon District, pp. 20, 113; Second Annual Report, U.S. Geol. Survey, p. 125.
[50]. Powell’s Geology of Uinta Mountains.