NOTES ON THE STRATIGRAPHY OF THE MOHAWK 

 VALLEY AND SARATOGA COUNTY 



BY 



CHARLES S. PROSSER 



MOHATVK VALLEY 



Sections at Ingham Mills 



Along the East Canada creek at Ing-ham Mills are interesting 

 exposures of the lower Trenton formation which show a recurrence 

 of the lithologic characters of the Birdseye hmestone 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: 



F««t 



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. 5tV~ 5"i^ 



B2 Drab colored typical Birdseye limestone. I0i^=i6 



B^ Black lumpy lirhestone having the lithologic 

 appearance of the Black river limestone. 5i^=2ii^ 



B* Light gray to drab layer having the lithologic 

 appearance of the Birdseye limestone. 1^=22^ 



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 



yyO- Massive limestone layers which are quarried 

 and at the same horizon apparently as the quarry at 

 the mill. 6 ^ = 6j^ 



(y Birdseye-like stratum ^t2=^ 9i^ 



C^ Non-Birdseye-like stratum 2^=11 J 



*13th annual report N. T. state geologist, p. 422, 423. 



