The physical geography of New York state . ike an ice dam, which held up the lake waters ( and 129). He has also proved the existence of formerchannels in New York, caused when the waters wereescaping toward the Mohawk !See Science, VI, 1885, 222; Proc. Amer. Assoc. Adv. Sci. XXXV, 1886, 222-3;Science, VIII, 1886, 205; Forum, V, 1888, 417-428; Sixth Kept. Niagara Comm., 1890,61-84; Smithsonian Rept. 1890, 231-257; Internat. Congress Geologists, 5th Session,(1891), Washington, 1893, 455-458; Bull. Geol. Soc. Amer., Ill, 1892, 492-493; same,493-4; Amer. Journ. Sci. CL, 1895, 18
The physical geography of New York state . ike an ice dam, which held up the lake waters ( and 129). He has also proved the existence of formerchannels in New York, caused when the waters wereescaping toward the Mohawk !See Science, VI, 1885, 222; Proc. Amer. Assoc. Adv. Sci. XXXV, 1886, 222-3;Science, VIII, 1886, 205; Forum, V, 1888, 417-428; Sixth Kept. Niagara Comm., 1890,61-84; Smithsonian Rept. 1890, 231-257; Internat. Congress Geologists, 5th Session,(1891), Washington, 1893, 455-458; Bull. Geol. Soc. Amer., Ill, 1892, 492-493; same,493-4; Amer. Journ. Sci. CL, 1895, 18; Bull. Geol. Soc. Amer., VI, 1895, 466; , XVIII, 1896, 231; Physiography of the United States, 1896, 203-236; Bull. Amer., VIII, 1897, 285-286; Nat. Geog. Mag., VIII, 1897, 233-247; EighteenthAnnual Report U. S. Geol. Survey, 1898, 595-647. 2 Bull. Geol. Soc. Amer., VIII, 1897, 285-286; see also Quereau, same, IX, 1898,173-182 and Davis, Popular Sci. Monthly, 1894, 218-29. Post-Glacial History f fix (in,it 249. FIG. 129. Gilberts map of the Great Lakes during the time whenthe St. Lawrence was ice-blocked. Leverett1 has done much painstaking work on the shorelines, especially of Erie and Michigan, and has added agreat deai to the glacial dam theory by pointing out therelation between the fraved-out ends of beaches and the
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