VERMONT. *), r ) 
vertically dotted lines. The typical features of the region are finely shown al certain 
points, and these have been utilized in drawing the hypothetical parts of the sec- 
tions. Symbols showing the structure at a number of the quarries are given on the 
large-scale quarry maps (Pis. XX and XXI), upon which the section lines have 
been drawn. 
GEOLOGKAL SE( TIOXS. 
SECTION I. — JAMESVILLE-HAMPTON. 
This crosses the Jamesville Cambrian slate belt. The occurrence of the < )rd< >vician 
red slate on the east of the Jamesville belt is shown at the Matthews quarries, a mile 
west of Poultney, in Hampton, and on the west at those of the National Red Slate 
Company, about a mile north-northwest of Raceville, in the town of Granville. 
About a mile due north of Raceville there is a small opening in red slate in close 
proximity to the Cambrian. The red slate dips easterly under the Cambrian by 
overturn. From 500 to 600 feet north-northwest of this the Hudson grits crop out, 
and a mile north-northwest, on the east side, three-fourths of a mile north of section, 
Mr. Walcott found Hudson graptolites in eastwardly dipping shales. 
The eastern base of the Jamesville Ridge consists of the Cambrian black slates and 
shales with small beds of limestone (D)." These also crop out at the bend in road 
south of section. These slates and shales form the uppermost strata of the ridge, 
(E) being absent, but that outcrop probably belongs to those on the west side of the 
ridge. Arising from beneath (D) are the green and purple rooting slates, with 10 
feet of limestone carrying Lower Cambrian fossils. There are seven or eight old 
quarries on the hillside. In the largest 20 feet or more of black and gray slates 
overlie the green and purple slates, which dip 22° E., with a cleavage of 35° E. A 
low easterly bedding and a steeper easterly cleavage (up to 45°) are well shown 
at several quarries. Beds of calcareous quartzite occur. The purple slates now 
underlie, now overlie, the green. In the main the ridge appears to he an anticline 
of (B) and (D), very much overturned to the west, with the red slates and the 
Hudson graptolite shales and the Hudson grits on both sides of it. In the section 
the only well-observed things are the relations of cleavage and bedding on the eastern 
slope. The overturn at the west where the Ordovician underlies is inferential and 
the other folds are hypothetical. 
SECTION II. — MIDDLE GRANVILLE. 
This crosses the Middle Granville "sea-green" and red-slate quarries. Judging 
from the dovetailing of the Cambrian and Ordovician a few miles south of Middle 
Granville, we should expect, immediately west of Middle Granville, first, an anti- 
cline, then a syncline. The Jamesville belt crossed by the eastern end of the section 
would be, as in Section I, anticlinal, and the intervening broad Ordovician belt 
would be synclinal in structure. 
There are about a dozen Cambrian slate quarries north of the village. Some meas- 
urements were taken about these quarries by the writer, but the locality is perplexing. 
There is a fault, and possibly much folding and faulting. The following succession, 
however, is clear, beginning above: Black shale and slaty shale (D), 70-100 feet; 
limestone with Lower Cambrian fossils, 4 feet; green and purple slate (B), 50-00 
feet. There is an open drainage cut 213 feet long, east of one of the larger quarries, 
which crosses the black shales and exposes one fault plane. There is a tunnel 180 
feet long west of the quarry, with a shaft at the end also in black shales. The men 
who worked in the tunnel report that it also traversed black shales. Wesl ol the 
haft is another slate quarry, and southeast oi the east end of the open cut still 
a See table on page 94. 
