REPORT OP THE DIRECTOR AND STATE GEOLOGIST 1901 r37 



The amount of deformation along the line of the channels has not 

 been determined with precision, but can be given approximately. 1 



The only reliable knowledge that we now have concerning the 

 changes of altitude of the region is based on the deformation 

 of the later Iroquois plane. Such deformation is all post-Iro- 

 quois. The present altitude of the Iroquois outlet at Rome 

 is 430 feet. Allowing 15 feet for depth of water at the outlet 

 would make the water surface of the later Iroquois 445 feet. 

 A strong gravel bar close to Wampsville station and 10 miles 

 southwest of Borne has an attitude of 446 feet. East of Syra- 

 cuse about 13 miles, and 2J miles east of Kirkville, is a strong, 

 recurved bar crossing the canal. By canal datum the western 

 end of this bar, which was exposed to the north and west winds, 

 has elevation of 447 feet, while the portion curving south across 

 the canal is 440^ feet. One mile southwest of Manlius station 

 and 7 miles east of Syracuse is a bar on the east side of a hill, 

 south of the tracks, with elevation of 437 feet, by the railroad 

 datum. By the same datum a bar 4 miles west of Syracuse 

 and \ mile east of Fairmount station has altitude of 441 feet, 

 but it lies in a narrow valley, protected from the northerly 

 winds, and probably is below the lake level. It would appear, 

 therefore, that the Iroquois plane has about the same altitude 

 at Syracuse as eastward toward Rome and has suffered no con- 

 siderable warping in the region. 



The eastern channels, between Rome and Oneida, which were 

 all formed previous to the initiation of Lake Iroquois, have ex- 

 perienced practically the same amount of uplift as the Rome 

 col. The channels at Syracuse have participated in all the 

 movements of that locality since the earliest phase of Iroquois. 

 But they are below the lake level of the place. The bottom of 

 the Burnet Park channel is 400 feet, according to the map con- 

 tours, and that of the Syracuse channel, leading east from the 

 city, is about 420 feet, and both channels are filled to unknown 



*A brief discussion of the deformation in central New York will be found 

 in two earlier papers by the writer: Geol. Soc. Am. Bui. 10:66; N. Y. State 

 Geologist 20th An. Rep't, p. Ill, 112. 



