[78] Chamberlin. Jour. of Geol., Vol. X, pp. 747–754.
[79] For an excellent discussion of deltas, see Gilbert, Fifth Ann. Rept. U. S. Geol. Surv., pp 104–8. Also Lake Bonneville, Monograph I, U. S. Geol. Surv. (same article).
[80] Davis. Physical Geography, p. 294.
[81] Humphreys and Abbot. Physics and Hydraulics of the Mississippi River.
[82] Corthell. Nat’l Geog. Mag., Vol. VIII, p. 351, 1897.
[83] Russell. Rivers of North America, p. 132.
[84] Prestwich. Chemical and Physical Geology, Vol. I, p. 85.
[85] Geike. Text-book of Geology, 3d ed., p. 402.
[86] Medlicott and Blanford, Geology of India. Chap. XVII; Medlicott, Records of the Geological Survey of India, 1881; Oldham, Geology of India, 2d ed., Chap. XVII; and Ferguson, Q. J. G. S., Vol. XIX, pp. 321–54. The extent of this and other deltas is variously stated, probably because it is difficult to determine the exact position of its head and borders.
[87] Dana. Manual of Geology, 4th ed., p. 198.