THE 



AMERICAN JOURNALOFSCIENCE 



[FOURTH SERIES.] 



Art. XXX. — Wave-cut Terraces in Keuka Valley, Older 

 than the Recession Stage of Wisconsin Ice ; by Frank 

 Carney. 



The tracing of the shore phenomena of the high-level lakes 

 which characterized the recession of the Wisconsin ice sheet 

 in New York State, particularly by Fairchild,* is one of the 

 most interesting and fascinating of the contributions to glacial 

 geology. Other geologists have performed similar tasks here 

 and elsewhere in the basin of the Great Lakes.t The post- 

 Wisconsin deformation or tilting of these ancient beaches has 

 attracted the attention of many investigators,^: Dr. G. K. Gil- 

 bert having given the subject special study. § 



So far as the writer is aware, however, no study has been 

 given to the evidence of static water bodies that presumably 



* H. L. Fairchild, this Journal, vol. vii, 1899, " Glacial Lakes Newberry, 

 Warren and Dana in Central New York"; Bulletin Geological Soc. Am., 

 vol. x, pp. 27-68, 1899 ; New York State Museum, 20th Eep. of the State 

 Geologist, 1901, " The Iroquois Shore Line," pp. rl06-rll2. 



f G. K. Gilbert, Geol. Survey of Ohio, Eep. of Progress, 1870, pp. 488-90 ; 

 same, vol. i, 1873, pp. 549-555, 559-560, 569-570 ; Sixth Eep. of the Niagara 

 Commission, pp. 61-84, 1890 ; T. C. Chamberlin, Geol. Survey of Wiscon- 

 sin, vol. ii, pp. 219-229, 1877; J. W. Spencer, Bull. Geol. Soc. Am., vol. i, 

 pp. 70-86, 1899 ; same, vol. ii, pp. 465-476, 1891 ; same, vol. iii, pp 488-492, 

 1892 ; A. C. Lawson, Geological and Natural Historv Surv. of Minnesota, 

 20th Annual Eep., pp. 230-289, 1891 ; F. B. Taylor, American Geologist, vol. 

 xviii, pp. 108-120, 1896; Bull. Geol. Soc. Am., vol. viii, pp. 31-58, 1897; 

 same, vol. ix, pp. 59-84, 1898; Frank Leverett, Monograph XLI, U. S. 

 Geol. Survey, pp. 371-383, 1902. 



^F. B. Taylor, American Geologist, vol. xiii, pp. 316-327, pp. 371-383, 1894 ; 

 J. W. Spencer, this Journal, xli, pp. 201-211, 1891 ; G. K. Gilbert, Smith- 

 sonian Eeport, 1890, pp. 236-244. (For more extended bibliographies under 

 footnotes, see E. S. Tarr, Physical Geog. of New York State, pp. 240-265, 

 1902.) 



§G. K. Gilbert, 18th Ann. Eep., U. S. Geol. Surv., 1898, pp. 595-647. 



Am. Jour. Sci.— Fourth Series, Vol. XXIII, No. 137.— May, 1907. 

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