PRY SIOGROPHY . 
The rocks of the region ovelong to the upper @Pevonion 
series and to the Potlage group. They are all or a 
shaly character, but some are sufficiently hard to allow 
of quarrying. About five miles south of the farm there is 
an abrupt rise in the land, constituting the northern 
limit of the plateau of the southern counties of New York 
otate. The farm itself estending from the Kesheyua creek 
on the east, westward into the hills is located in a broad 
preglacial valley. Mlany geolozists maintain that this 
valley was formerly \ ccusied by the Genesee river. Atv 
Portage ten miles south that river has been diverted rrom 
its course, to the present gorge. About six miles north 
down the Kesheyua valley there is at present a large amount 
of drift. Taking this into account and also taking into 
account the fact that the ice sheet retreated toward the 
north it is evident that during glacial times and for a 
considerable time thereafter the Keshequa valley was occupied 
by a lake. Gradually the dam at its northern end has been 
cut down and now no Lake remains. The creek to-day flows 
through the old river course and joins the river near Mount 
MOrris. 
. The farm has a slope from west to east. The lands 
on the lower portion which are very close to the creek are 
flat. dust to the west of them is a steep slope, beyond 
