North of the railroad, opposite Shelter Rock (fig. 6), is a most
interesting flat-topped ridge of drift which topographically is an
extension of the higher rock mass to the northwest. In this drift mass
are to be found in miniature a number of the forms characteristic of
glacial topography. The broad-topped gravel ridge slopes sharply on
the north into a flat-bottomed ravine which is evidently part of the
Still River lowland. This portion of the valley has been shut off by
drift deposits. The drainage has been so obstructed that the stream in
the ravine turns northeast away from its natural outlet. In the valley
of "X" brook (fig. 1) are terraces, esker-like lobes, and detached
mounds of stratified drift resting on a foundation of till.
Along the eastern border of the hill is to be seen the contact between
two forms of glacial deposits (Pl. IV, B). A mass of stratified drift
overlies a hummocky deposit of coarse till, but large boulders
occurring here and there on top of the stratified drift show that the
ice-laid and water-laid materials were not completely sorted. Boulders
seem to have been dropping out of the ice at the same time that gravel
was being deposited. Boulders of granite-gneiss eight feet or more in
diameter, carried by the ice from the hills to the north and
northeast, are strewn at the foot of the hill.