214 J. D. Dana—Greological Relations of the 
Such facts sustain the inference as to the former connection 
of the rocks of the east and west sides of the river, and strongly 
favor the view that the succession in the rocks noted was de- 
pendent originally on stratification. 
If the thickness of the schists at Cruger’s Point may be taken 
as that at Stony Point, the submerged Cruger limestone is to 
be found beneath the bottom mud of the river within a few 
hundred feet of the southeast shore. 
noryte and the other Cortland rocks. One of the two areas 
extends up Sprout Brook or Canopus Hollow, and the other up 
the valley in the village of Peekskill along which Center street 
descends toward the river. The southern extremities of these 
areas are shown on the map, page 195; the former has the 
strike N. 52° E. and dip 75° S.; the latter, N. 78° E. dip 75° S. 
Figure 17 represents a section about 1300 yards in length from 
a 6 cd ‘J. gs 
north to south, along the line marked a 4c on the map, starting 
from the limestone at the mouth of Sprout Brook, near the Iron 
works. The limestone (a) lies against true, whitish, well-bed- 
ded, conformable quartzyte (a to 6); this quartzyte changes 
gradually to jointed massive granitoid and gneissoid quartzyte, 
with only an occasional bedded band or plane; each such band 
or plane is conformable in direction to the limestone and the 
adjoining bedded quartzyte. This quartzyte (the rock referred 
to on page 24 of this volume) continues southward to the 
Center street valley, but on the north side of the valley, just 
back of Hill’s Foundry, it is followed by an arenaceous mica 
schist (¢ @), with the strike varied to N. 78° KE. the dip remain- 
ing the same; then, on the south side of the valley, 50 yards 
above Baxter's Iron Works (on Water street), the limestone of 
the second belt Tar having the same dip and strike as the 
mica schist; and behind these iron works, thin-fissile dark- 
gray mica schist (containing both white and black mica) ap- 
layer—a kind: of coarse mica schist—intersecting it near its 
middle which is conformable in its strike and dip with the mica 
schist and limestone of Center street valley ; and it shows conform- 
