208 NOVA SCOTIAN GEOLOGY.—HONEYMAN. 
Clinton age, farther on where the brook enters the river is a green 
marble of lower carboniferous age, and on the north side of the 
river opposite, in close connection with an igneous dyke is the 
continuation of the Blanchard strata, middle silurian, having 
lower carboniferous limestone in contact, I have no doubt what- 
ever that there is a connection of the strata of the north and 
south areas of fossiliferous rocks under the bed of the river. The 
extension of the igneous rocks observed on the road to the 
Iron ore, No.3, would occupy the obscure interval in the brook 
between the two sets of strata forming a complete anticlinal 
instead of the apparent monoclinal. 
All this seems sufficient to determine the approximate age of the 
strata containing Iron ore, No. 3. This is consequently indicated 
on the map as middle silurian, which may be called the “upper 
series of the Cobequids.” Geologists have had to callin the aid of 
the iron divisions of section No. 2 of our map, and to regard the 
formeras devonian, upper or middle silurian, according to the 
views entertained regarding the age of the latter. 
PALEONTOLOGY OF THE REGION MAPPED. 
The sign ff is of frequent, occurrence on the map, in A, B, B, 
C, D of the “Upper Arisaig series” having fossils, that belong 
Ist to the Middle Silurian period. 
2nd to the Upper Silurian period. 
3rd We have ff occurring in limestones of the Lower Carbonifer- 
ous period. 
4th In the south and north side of the coal measure polygon. 
I shall briefly collate and examine the Middle and Upper 
Silurian Faunas; and then examine the fauna of the Carbonifer- 
ous period. 
Regarding the Silurian series of the Springville division of 
section ten as representative of the Typical series. I shall group 
the seattered fauna around its members. Our passage will thus 
bo direct into the lower and into the middle carboniferous age. 
