58 
Feet 
West Point formation — Con. 
Crotalocrinus limestone with a 2-foot flow of basalt 50 
Third marine basalt flow and breccias with inclusions of limestone and 
shale 380 
Interbedded limestone and shale of Macrea cove. Dip 90 degrees 100 
Fourth or great and final basalt flow, about 3,500 
Near the centre of this mass is Lazy cove, backed with about 75 feet of 
red clay, probably of the Bonaventure formation. Clarke gives the 
sear-face of this fourth flow as about 4,000 feet long 
Great break in section. Devonian mountain-making followed 
Bonaventure intermontane desert conglomerates and shales, with many 
boulders of the Silurian basalts; near the base they are of reddish Silurian 
limestones and corals. 
COMPARISON OF THE BLACK CAPE SECTION WITH THAT 
OF THE PORT DANIEL-GASCONS AREA 
In contrasting the Black Cape sequence with that of the Port Daniel- 
Gascons area, it is at once apparent that the former area has far less lime- 
stone and is at least 2,200 feet thicker. This greater thickness occurs 
in the middle time of accumulation when the detritals were pouring into 
the seaways of both regions. 
Another very interesting feature is that at Black cape the Middle 
Silurian seas were overwhelmed with volcanic eruptions of basalt, there 
being about 500 feet of these flows interbedded with marine deposits, 
followed by the final flows over the dry land that at Black cape still preserve 
not less than 3,500 feet of- basalts. But long before the basalts attained 
the surface, volcanic vents were blowing out ash, since the latter appears 
in the marine deposits about 1,600 feet beneath the first basalt flow. 
These volcanic eruptions fall in with the time of other great ash and basalt 
accumulations of southeastern Maine, and it will probably be learned 
that volcanism of this time was even more widely spread throughout the 
Maritime Provinces of Canada. 
In the follow ng table the Silurian formations of Port Daniel-Gascons 
area are approximately correlated with those of Black Cape region. In 
detail no exact correlations can as yet be made, nor can definite boundary 
lines be drawn between the unbroken formations of the two areas, and yet 
we know enough to make approximate correlations. These are as follows: 
— 
Port 
Daniel 
Black 
cape 
Indian Point formation 
Feet 
194 
1,445 
800 
?1,800 
285 
170 
385 
Feet 
Absent 
326 
2,670 
3,400 
765 
225 
Covered 
West Point limestones 
Bouleaux shales and limestones 
Gascons formation (Taonurus zone) 
La Vieille limestones 
La Vieille sandstones 
Clemville formation 
5,079 
7,386 
and 4,000 
of basalt 
