Warren Upham. The Glacial Lake Agassiz, Mon. 25, U. S. Geol. Surv., pp. 474-522.

Uptilt in Laurentian Basin:—

G. K. Gilbert. Recent Earth Movement in the Great Lakes Region, 18th Ann. Rept. U. S. Geol. Surv., 1898, Pt. ii, pp. 595-647.

J. W. Spencer. Deformation of the Algonquin Beach, etc., Am. Jour. Sci. (3), vol. 41, 1891, pp. 14-16.

F. B. Taylor. The Highest Old Shore Line of Mackinac Island, Am. Jour. Sci. (3), vol. 43, 1892, pp. 210-218.

A. C. Lawson. Sketch of the Coastal Topography of the North Side of Lake Superior, with reference to the abandoned strands, etc., 20th Ann. Rept. Geol. and Nat. Hist. Surv. Minn., 1893, pp. 181-289, pls. 7-12.

J. B. Woodworth. Ancient Water Levels of the Champlain and Hudson Valleys, Bull. 84, N.Y. State Mus., 1905, pp. 265, pls. 28.

E. L. Moseley. Formation of Sandusky Bay and Cedar Point, Proc. Ohio State Acad. Sci., vol. 4, 1905, Pt. v, pp. 179-238.

F. E. Wright. Rept. Geol. Surv. Mich. for 1903, 1905, p. 37.