[88] Salisbury and Kümmel. Lake Passaic. Ann. Rept. of the State Geologist of New Jersey, 1893, and Jour. of Geol., Vol. III. p. 533.

[89] Gilbert. Lake Bonneville, Mono. I, U. S. Geol. Surv.

[90] For discussions of terraces see Gilbert’s Henry Mountains, p. 126; Davis’ River Terraces in New England, Bull. of the Mus. of Comp. Zool., Geol. Series, Vol. V, pp. 282–346; and Dodge, Proc. Boston Soc. of Nat. Hist., Vol. XXVI, pp. 257–73.

[91] Davis, Bull. Mus. Comp. Zool., Geol. Ser., Vol. V.

[92] This point has recently been emphasized by Davis, loc. cit., pp. 282–346.

[93] Murray. Scot. Geog. Mag., Vol. III, p. 70, 1887.

[94] Hoskins. 16th Ann. Rept., U. S. Geol. Surv., p. 853.

[95] Van Hise. Principles of North American Pre-Cambrian Geology, 16th Ann. Rept., U. S. Geol. Surv.

[96] For a full discussion of this subject see King, 19th Ann. Rept., U. S. Geol. Surv., Pt. II, and Slichter, Water Supply and Irrigation, Paper No. 67, U. S. Geol. Surv.

[97] For tables see Buckley, Building and Ornamental Stones, Bull. IV, Wis. Surv., and Merrill, Stones for Building and Decoration, and various Survey Reports.