The fv(i)ne-JIoraine <t( Rochester, y. i'. — Fnivchilil. 41 
left undisturbed for some time, yet not so long as to crumble. 
Mr. Upliam is mistaken In describing the hills as a "ridge," 
and he seriously underestimated the amount of till in their 
mass and the great amount of disturbance to which the beds 
have been subjected. Several important cliaracters which are 
not noted in 3fr. Upham's paper will be briefly described in 
the following pages. 
Location and Gkolping ok the Hills. 
The Pinnacle hills extend from the village of Brighton to 
the Genesee river, a distance of four miles, with a general di- 
rection of west 15° south. The belt of hills has a linear 
form with a distinct curvature of large radius, the convexity 
facing southward. The range, however, is not continuous or 
uniform, but consists of groups of irregular hills and knolls, 
three main divisions being easily recognized. The first large 
group extends from Brighton to Monroe avenue. This group 
is subdivided by a deep cut, the western mass being known 
as Cobb's hill, with a summit bight of 663 feet above tide. 
The sag which was cut by Monroe avenue origiilally had an 
elevation of 5(50 feet. The second large group lies between 
Monroe avenue and a sag or depression one-fourth of a mile 
west of South Clinton street (Pinnacle avenue). This group 
is the most distinct and compact, and contains the highest 
point in the whole range, called the "Pinnacle," which name 
has been extended to cover the whole series of hills. The al- 
titude of this summit is 749 feet, or about 240 feet above the 
surrounding plain. The third group may be regarded as in- 
cluding all tile western part of the hill range, which is lower 
than the eastern part, much broader and less definite. This 
includes in succession, westwardl3% the knolls east of South 
Goodman street; Highland park, between Goodman street and 
South avenue; the "Warner tract," lying between South and 
Mt. Hope avenues; Mt. Hope cemetery, lying west of Mt. Hope 
avenue; and the low point running into a bend of the Genesee 
river. The highest points in this area are the knoll on which 
is built the Memorial pavilion, near the reservoir, 650 feet, 
and summits in the cemetery, 650 to 670 feet. 
