STRATIGRAPHY OF MOHAWK VALLEY AND SARATOGA CO. 475 
D*® Boulder clay in which are boulders of various ai 
sizes. The thickness varies in different parts of the 
quarry from 5 feet, 10 inches to 8 feet. 8—=2424 
D? Soil to top of the quarry. 112434 
The dip varies in different parts of this quarry from 2° to 5° S, 
40° to 45°E. The Birdseye limestone does not appear to be 
represented in this section but it occurs at the eastern end of an 
old quarry below the highway a mile northwest of the Moore 
quarry. ‘This is the most eastern outcrop of the Birdseye lime- 
stone that the writer has seen on the southern side of the Mohawk 
river. 
Hoffman fault 
The section on the northern side of the river from Hoffman to 
the top of Van Epp’s hill and the fault have already been described 
by the writer! and by Mr Darton.2 The gorge known as Wolf’s 
hollow has been excavated for three fourths of a mile along the 
line of this fault. At its southern end near the point at which the 
highway turns to the east the foot wall composed of Calciferous 
sandstone forms a high cliff, the top of which is 150 feet above the 
creek level; while on the eastern side is the lower hanging wall 
of the Hudson river formation. Mr Darton referred the country 
to the east of the fault to the Utica slate; but at the lower 
end of the gorge there are heavy sandstone strata alternat- 
ing with blackish to bluish shales which in Montgomery 
county mark the Hudson river formation to the lower part 
of which the writer refers these rocks. In places near the top 
of the Calciferous cliff, or foot wall, are exposures of Trenton lime- 
stone and farther up the glen apparently of Utica slate which dips 
very steeply to the east, having from all appearances dragged on 
the Calciferous sandrock when the displacement occurred. The 
fault scarp is again well shown to the north of the glen near the 
Weatherwax quarry at the corners a mile southwest of Glenville. 
At this locality 9$ feet of Trenton is shown on the eastern side and 
just to the east of the quarry along the fault scarp 12 feet, 2 inches 
of this limestone. The direction of the fault to the south of the 
113th annual report N. Y. state geologist, p. 655-56, section 2A. 
714th annual report N. Y. state geologist, p. 49, 50. 
