STRATIGRAPHY OF MOHAWK VALLEY AND SARATOGA CO. 477 
On the eastern side of the creek the Trenton limestone is the 
lowest rock exposed occurring along its bank both below and 
above the bridge and below the falls though not on a line with 
them but at a level from 8 to 10 feet lower. Mr Darton reported 
3 feet of Birdseye sharply separated from the Calciferous sandstone 
which was the farthest east that he saw this limestone.1 The Tren- 
ton he reported as 28 feet thick, “ thin bedded members below with 
heavier bedded and slightly coarser grained beds above” (p. 427). 
Saratoga Springs sections 
Three miles west southwest of Saratoga Springs on Ellis creek 
at Rowland’s mills is the Wing quarry where a considerable ex- 
cavation has been made in the Trenton limestone. The section of 
this quarry is as follows: 
12E! Massive thick bedded limestone, some of i 
the layers containing numerous fossils. Trenton | 
limestone. 1414 
E? Shaly Trenton limestone. 519 
E? Boulder clay varying in different parts of the 
quarry from 7 to Io feet in thickness. 7==26 
E* Champlain sand. 3-20 
He Soil, 
In the accompanying picture the students are standing on top 
of the shaly Trenton limestone and back of them is the boulder 
clay. Darton in his Geology of the Mohawk Valley mentions this 
quarry when he states that 20 feet of the Trenton formation was 
exposed at this locality which was called Howland’s Mill (p. 427). 
The stratum which forms the floor of this quarry and is better 
shown on the eastern side of the highway contains numerous and 
beautiful specimens of Cryptozoon proliferum Hall. 
This is the locality described by Prof. Hall when he states that 
“At a single exposure on the farm of Mr Hoyt, the surface of the 
limestone is covered by these bodies for many rods in extent’? 
and the limestone was referred to the “ Calciferous sandstone”. 
Later Mr Walcott referred a considerable thickness of so-called 
Calciferous in the vicinity of Saratoga Springs to the Potsdam 
stating that “ This limestone was referred to the Calciferous forma- 
113th annual report N. Y. state geologist, p. 423, 427. 
336th annual report N. Y. state mus. nat. hist. 1883, description of pl. 6. 
