E 
- eeous and associated with quartzose beds, and others very talcose 
18 Geology of Canada. 
or is associated with a diallage rock, and in others to be a mixture 
of quartz and serpeutine. Like the western band, it is accom pa- 
nied with soapstone and contaius veins and disseminated grains 
of chromic iron. § 
Beyond this occur clay slates with beds of white, compact ji 
quartz of a scaly fracture and horny lustre, containing often im- 
bedded diallage, hornblende, pyroxene or feldspar ; sometimes the 
rock is nearly homogeneous, but at other times grains of angular, hi 
transparent quartz show clearly its conglomerate character. This a 
rock accompanies the serpentine throughout, and constitutes a | 
range of mountain peaks, one of which, Orford Mountain, is more 
than four thousand feet above the sea. Beyond this still, on the 
ine of section is a band of impure dolomite, which farther north 
in the strike is replaced by soapstone, magnesite, and serpentine ; 
a similar band is seen again after an interval of a mile, filled with 
gray slate and the corneous rock. 
To these rocks follow gray fossiliferous limestones interstrati- 
fied with calcareous slates, which form apparently two narrow par- 
allel tronghs, one on each side of Lake Memphremagog. On the : 
erst side, at Georgeville, they are followed by gray and black 
glossy slates, and then by talcose and chloritic slates, often mica- 
in the strike of ae upon the lake appears a band of serpentine, 
ever hy fine: silicious talcose slates. From the position o 
ese rocks, there appears evidence of a great dislocation which 
se divided the fossiliferous troughs and brought up the corneous 
rock in a mountain mass on the west side of the lake. Evidence 
of an anticlinal in this line is found in the dip of the fossiliferous 
limestones near the quartzose rocks farther on in the strike. Be- | 
yond these rocks, east of Georgeville, highly crystalline limestones 
appear, which however still display ~ that admit of identifi- 
The remaining twenty miles of the section to the Connecticut 
exhibit these crystalline micaceous limestones, interstratified with 
suft micaceous slates; the calcareous beds predominate for a few 
miles, but the calcareous matter finally gives . to silicious, 
and the slates become stronger. Some of the prior argillaceous 
rt contain chiastolite, and others exhibit hornblende and gar- 
nets. ‘The limestones are more or less micaceous, and often very | 
erystalline; some are quite white, while others are grayish or : 
blackish, Even the most crystalline present on their weathered 
surfaces the forms of eucrival dises and corals ; i in several 
the Riviere de Famine, the rock, which is here less sol 
