150 Jil, Shy, JTAUTRCSEMUE IO 
coarse material upon the surface. Two huge Niagara blocks 
were seen on a gravel knoll at an altitude of 720 feet. A well 
upon one of the knolls in the southern part of the eastern section 
is said to have penetrated 130 (?) feet of clear sand. 
Relationship to surrounding features—An examination of the 
Rochester sheet of the New York topographic map will give a 
general view of the surface and surroundings of the kame area. 
It should first be noted that it lies in a drumloid area of high 
altitude, and a trifle west of south of the Irondequoit bay depres- 
sion. The tract northward between the kame hills and Pittsford, 
four miles, is strongly drumloidal. Upon the west the country 
is distinctly but brokenly drumloidal and for two miles is not 
so strongly ridged. The twenty-foot contours of the topo- 
graphic map do not anywhere fully indicate the drumloidal 
character of the surface. Southwestward the surface is drum- 
loidal to the Corniferous escarpment, the overwash partially 
burying the lesser inequalities. Immediately south of the kame 
hills, at the village of Mendon Center, are distinct drumloids, 
and others apparently occur upon the southeast border. LEast- 
ward and southeastward the country is comparatively open and 
rolling for several miles, to the Victor kame hills. Immedi- 
ately east of the middle of the kame area the:ridges are quite 
wanting, the highest contour being 680 feet. 
Concerning the rock floor or base of the region little is known. 
Upon the Howard farm, on the extreme western edge of the kame 
area, it is said that a well, starting on the 700-foot contour, was 
driven 130 or 140 feet without reaching bed rock. The well 
above referred to started at an altitude of about 680 feet and 
found no rock at depth considerably over roo feet. In the southern 
part of the sand plains, on the farm of Mr. Judson F. Sheldon, 
rock is said to have been found at a depth of 69 feet. The plain 
at this point is near 600 feet altitude. 
Eastward or westward of the kame hills there is but the slight- 
est suggestion of amoraine. One and one-half miles northward of 
the Big ponda slightly morainic surface is shown among the drum- 
loids, also two miles west, along the Lehigh Valley Railroad. 
