43^ Frank Carney 
no case do any of them present a linear extension of more than a 
few rods. 
Drift of an Earlier Ice Invasion. 
Positive evidence that the region included in the Moravia quad- 
rangle was glaciated previously to the Wisconsin invasion was not 
found in this investigation. No contact between drift of dif- 
ferent ages has been noted, neither have I observed individual 
deposits which suggest drift older than the Wisconsin. The 
strongest suggestion of any earlier glaciation is the presence of 
apparent interglacial drainage lines. 
In spite of the lack of direct or positive evidence of the existence 
of an older drift sheet, in all probability this region was glaciated 
once at least previous to the Wisconsin invasion. Several lines 
of indirect proof point to this conclusion. 
The work of Leverett,^® Salisbury,^^ Woodworth, Fuller,^ 
Clapp, and others^" along parallels both east and west of the Finger 
lake district gives cumulative evidence of the existence of drift older 
than the Wisconsin. Knowing that ice of an Illinoian or some 
older sheet reached into southern New England and across Long 
Island into New Jersey, and that drift classified as Kansas has 
been found in northwestern Pennsylvania, the chance that the 
plateau section of New York state escaped glaciation contempo- 
raneous with the ice depositing such drift in those areas is indeed 
slight. Indirectly, then, we infer that the presence of older ice 
on both sides of the Finger lake region and farther south implies 
that this region itself was covered by that ice. 
The amount of erosion accomplished in these Finger lake i 
valleys suggests, according to Tarr,^® more than one ice-invasion. 
In acounting for some of the hanging valleys he alludes to the i 
Monograph, xli, U. S. Geol. Survey (1902), p. 228. 
Geological Survey of New Jersey, Annual Report for iSgj, pp. 73, etc.; vol. 
V (1902), pp. 187-89, 751-82. 
N. T. State Museum, Bulletin ^8 (1901), pp. 618-70. 
American Geologist, vol. xxxii (1903), pp. 308-12. 
Bull. Geol. Soc. Am., vol. xviii (1908), pp. 505-556. 
A. C. Veatch: Jour, of Geol., vol. xi (1903), pp. 762-76. L. H. Woolsey: 
Beaver Folio, no. 134 (Penn.), U. S. Geol. Surv. (1905), p. 7- 
Am. Geol., vol. xxiii (1904), p. 284. Bull. Geol. Soc. Am., vol. 16 (l 905 )>PP- 
239-40. yo«r. o/G^’o/., vol. xiv (1906), pp. 20-21. Pop. Sci. Monthly (fWidLy, 
PP- 392-93- 
I 
