STRATIGRAPHY OF MOHAWK VALLEY AND SARATOGA CO. 473 
Feet 
part of the cascade is formed by a massive layer 4 feet, 
8 inches in thickness extending to the base of the 
upper part of the cascade. The rocks forming the 
upper and lower parts of this cascade have a thickness 
of 263 feet. Calciferous formation. 92164 
18 Drab colored limestone under highway bridge. 
Birdseye limestone. The base rests on top of the 
Calciferous impure limestone in the bed of the creek 
and the top is shown in the vertical ledge of rock 
under the bridge. 54—=1693 
I* Dark gray to blackish lumpy limestone about 
7% feet thick. Black river limestone. 75177 
I° Thin bedded, dark blue limestone extending 
above the house of Mr John Swarts. Part of the 
layers are very fossiliferous. Trenton limestone. 43—=220 
I Some 2 feet of black argillaceous shale in the 
creek just above the Swarts barn. Utica slate. 2=-222 
To the north of the creek on the Swarts farm is.a small quarry 
in the Birdseye where 54 feet of this limestone is shown capped by 
the Black river. Along this terrace for one mile from Swartstown 
creek to that opposite Crane’s village there are quite frequent 
outcrops of the Birdseye and Black river limestones in which a 
number of quarries have been opened. The Birdseye limestone 
is shown in this ledge to better advantage than at any other locality 
in the lower Mohawk valley, specially in the woods about south 
of Crane’s village near the old Phillips quarry. The limestone 
is light drab in color, very compact and fine grained and contains 
numerous and beautiful specimens of Phytopsis tubulosa 
Hall; in every respect this is typical Birdseye limestone. The 
southern wall of an old quarry in this terrace about south of Crane’s 
village gives the following vertical section: 
46K! Lower part of quarry wall apparently rest- ne 
ing on the Calciferous limestone. Birdseye. 74== 7% 
K? Very dark gray or blackish lumpy limestone. 
Black river. 76—=154 
K? Very fossiliferous, thin bedded, blue limestone; 
5 feet, 10 inches in the eastern and 8 feet, 10 inches in 
the western part of the quarry wall. Trenton lime- 
stone. 83244 
