39$ NEW YORK STATE MUSEUM 



Morris, and extend westward on the high ground (1200 to 1800 

 feet) past Pavilion, Wyoming, Dale and Linden to Attica. East of 

 the Genesee river the southern limit may be taken as a line join- 

 ing the south end of Conesus lake with the north ends of Hemlock 

 and Honeoye lakes, the middle of Canandaigua lake and the north 

 ends of Seneca, Cayuga, Owasco and Skaneateles lakes ; and thence 

 eastward south of Syracuse to Fayetteville. The villages and cities 

 which nearly mark this boundary are Oakfield, Leroy, then the 

 southwestward stretch to Attica and Mount Morris, Conesus, Hem- 

 lock, Honeoye, Middlesex, Potter, Geneva, Waterloo, Seneca Falls, 

 Cayuga, Auburn, Skaneateles, Marcellus, Onondaga Hill, Jamesville 

 and Fayetteville. 



In a broad way it may be said that the general area of drumlins 

 covers all the low ground of the Ontario plain north of the 

 Finger lakes and reaches up the north-facing slope to high ground 

 approaching the divide. Between Honeoye and Canandaigua lakes 

 the drumlins lie as high as 1700 feet. 



Within the great drumlin area as described above some minor 

 divisions can be recognized With reference both to time and to 

 southern position the first series or group may be designated as the 

 Attica-Geneva series or the western Finger lakes series. This lies 

 on the higher ground and includes the area between the Tonawanda 

 valley and Seneca lake, covering the section of the Genesee valley, 

 and Conesus and Canandaigua lakes as noted above. 



The second series, Oakfield-Palmyra-Syracuse, lies on the low 

 ground and includes the central part of the drumlin district and the 

 most striking drumlin topography, with a width in the central 

 part of about 20 miles. On the meridian of Rochester, east of the 

 Genesee river the first and second series are united. 

 ' A third and still later series includes the drumlins which bor- 

 der Lake Ontario from Sodus eastward — the eastern Ontario 

 series. 



The drumlinizing of the Xiagara-Genesee prairie (subsequently the 

 Iroquois lake bottom) was probably contemporary with the second 

 and main series. The complete mapping of the somewhat indefinite 

 morainic belts, a study now in progress, will determine more certainly 

 the time relations of the several drumlin series. Plate 1 shows the 

 distribution as well as it can be portrayed at present. 



A separate group of drumlins lies on the high ground about 



