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 call in the aid of 

 the iron divisions of section No. 2 of our map, and to regard the 

 former as devonian, upper or middle silurian, according to the 

 views entertained regarding the age of the latter. 



Palaeontology 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 



1st 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 No. 2 as representative of the Typical series. I shall group 

 the scattered fauna around its members. Our course will thus 

 be direct from the lower into the middle carboniferous age. 



