358 H. L. PAIRCHILD — GLACIAL LAKES OF WESTERN NEW YORK. 



all cases taken from verified railroad levels, and usually represent the 

 lowest places or notches in the divide. In no instance do they indicate 

 hilltops or extremely high points. 



The glacial lake outlets across the divide, which are referred to in this 

 paper, are indicated by placing the numerals transverse to the line of 

 water-parting. These figures give the height of the present bottom of I 



the stream-channel on the col, or the present height of the " waste-weir." 

 Obviously this is considerably below the lake surface. 



The Dansville Lake. 



canaseraga valley. 



The Canaseraga creek flows into the Genesee river at Mount Morris. 

 The lower and main part of the valley extends from Mount Morris south 

 to Dansville, a distance of 15 miles. This valley has a width at the 

 bottom of more than one mile, an altitude above sealevel of about 690 

 feet, and the slopes rise steeply on either side an added height of from 800 

 to 1,000 feet. About three miles south of the present village of Dansville 

 the valley is interrupted and deeply filled with drift. Two mature post- 

 glacial valleys originally united here. One of them leads southwest 

 toward Hornellsville and is now occupied by the middle portion of the 

 Canaseraga creek. The other, of less definite character, opens southeast 

 toward Way land and holds Whiteman and Perkinsville creeks. A fourth, 

 and postglacial stream, Stony brook, flows down from the tableland 

 southward, and has produced one of the finest glens in the state. These 

 four streams join near the village. The preglacial valleys are choked 

 with glacial drift, and south of the moraine-fillings the valleys are half 

 buried under the gravel overwash and the stream deposits. The valley 

 of Conesus lake is connected with the Dansville valley by a cut or trans- 

 verse valley about 200 feet higher than Dansville. 



DIVIDES. 



The Delaware, Lackawanna and Western railroad climbs the east side 

 of the valley, being 335 feet above Dansville village, and winding south- 

 east over the moraine to the Cohocton valley, gives us by its summit 

 level the height of the col in the southeast tributary valley. The highest 

 point on the railroad is three-quarters of a mile west of Wayland station, 

 with an altitude of 1,364 feet. This is only five or six miles from Dans- 

 ville, and the valley bottom here is a comparatively smooth plain. 



The col in the southwest or middle Canaseraga valley is near Burns 

 station on the Hornellsville branch of the " Erie " railroad, about ten 

 miles from Dansville. The drift is here smoothed off into a plain, upon 

 which the railroad lies, and the altitude of the railroad station is given 



