J. W. Goldthwait. The Abandoned Shore Lines of Eastern Wisconsin, Bull. 17, Wis. Geol. and Nat. Hist. Surv., 1907, pp. 134, pls. 37; A Reconstruction of Water Planes of the Extinct Glacial Lakes in the Lake Michigan Basin, Jour. Geol., vol. 16, 1908, pp. 459-476; Isobases of the Algonquin and Iroquois Beaches and their Significance, Bull. Geol. Soc. Am., vol. 21, 1910, pp. 227-248, pl. 5; An Instrumental Survey of the Shore Lines of the Extinct Lakes Algonquin and Nipissing in Southwestern Ontario, Mem. 10, Dept. of Mines, Canada, 1910, pp. 57, pls. 4.
William H. Hobbs. The Late Glacial and Post-glacial Uplift of the Michigan Basin, Pub. 5, Mich. Geol. and Biol. Surv., 1911, pp. 68, pls. 2.
Lawrence Martin. [Post-glacial Modifications in and Around the Great Lakes], Mon. 52, U. S. Geol. Surv., 1911, pp. 455-459.
Uptilt in northern Europe:—
G. de Geer. Quaternary Changes of Level in Scandinavia, Bull. Geol. Soc. Am., vol. 3, 1892, pp. 65-68, pl. 2.
H. Munthe. Studies in the Late Quaternary History of Southern Sweden, paper No. 25, Livret Guide, Cong. Géol. Intern., 1910, pp. 96, many plates and maps.
CHAPTER XXV
NIAGARA FALLS A CLOCK OF RECENT GEOLOGICAL TIME