NOTES ON THE STRATIGRAPHY OF THE MOHAWK 
VALLEY AND: SARATOGA COUNTY 
BY 
CHARLES S. PROSSER 
MOHAWK VALLEY 
Sections at Ingham Mills 
Along the East Canada creek at Ingham Mills are interesting 
exposures of the lower Trenton formation which show a recurrence 
of the lithologic characters of the Birdseye limestone above the 
Black river limestone. The following section is shown on the bank 
of the creek and in the quarry just above the highway bridge at 
the mills: 
Feet 
77B+ Somewhat arenaceous limestone which ex- 
tends to the creek level. In some of the layers are 
markings like great fucoidal stems. The rock is like 
impure Birdseye limestone. 55 5 
B? Drab colored typical Birdseye limestone. 1033516 
B® Black lumpy limestone having the lithologic 
appearance of the Black river limestone. 542154 
B* Light gray to drab layer having the lithologic 
appearance of the Birdseye limestone. 12223 
On the highway above the mill this stratum is 2 feet, 5 inches in 
thickness with vertical markings like Phytopsis. Mr Darton 
has described a section at this place! but I was unable to locate 
it or its divisions precisely. | 
By the highway above the mill another section was measured 
which gives higher rocks than the one just described: 
Feet 
77C! Massive limestone layers which are quarried 
and at the same horizon apparently as the quarry at 
the mill. | 64F3 = 649 
C? Birdseye-like stratum 25—= 9,3, 
C? Non-Birdseye-like stratum 2-3,==114 
113th annual report N. Y. state geologist, p. 422, 423, 
\ 
