IIOXEYMAX GEOLOGY OF ANTIGONTSHE COUNTY. 59 



that succeed them in our section. With our predecessors \vc had 

 taken for granted that Lower Carboniferous strata skirted the shore, 

 having for their termini the conglomerates of Malignant Cove and 

 Cape St. George. The rocks before us are, as far as observed, 

 non-fossiiiferous. They are, however, unfjuestionably pre-carbon- 

 ifcrous — a thin bed (?) of calcite is regarded as of organic origin. 

 Their age is considered to be Upper Arisaig. They may be on the 

 Middle Arisaig horizon. Farther examination is required to decide 

 this point. 



We have next the Lower Arisaig series. The first rocks of this 

 series are syenites, dark red, cream-coloured and white ; they are 

 finely granular, sparingly hornblendic and susceptible of a fine 

 polish. Green feldspar occurs in these syenites ; they arc also 

 traversed by veins of calcite, several inches thick, and penetrated 

 by veins of diorite. Succeeding these are strata of petrosilex. 

 These are traversed by quartz veins, having mica. After these 

 come steep cliffs of granitoid diorites which project into the sea. 

 We have then a bed of ophicalcite and ophite. This extends to 

 the road where it outcrops. To a distance of nearly two and a 

 half miles there is a series of diorites, ophites, crystalline limestones 

 and ophicalcites. The diorites are often granitoid ; sometimes the 

 hornblende is in large crystals, set in albite. These are the rocks 

 which produced the bouldei-s in the drift and on the shore at 

 Ogden's. Often the diorite is homogeneous and crypto-crystalline. 

 One rock is almost entirely hornblende and coarsely crystalline. 



Veins of snow-white calcite and quartz traverse the diorites in 

 the same manner as the syenites. In one thick vein of quartz in 

 the diorite there is talc in prismatic crystals as well as amorphous. 

 The ophite often passes gradually into the hornblendic rocks 

 (diorites), as if pseudomorphous. A hand specimen in the 

 museum has the ophite blending with the diorite. I regard this 

 series as divisible into two members as I have already indicated. 

 1st — syenites, diorites, and hornblendic rock; 2nd — ophites, 

 ophicalcites, granular limestone (marble), and petrosilex. I con- 

 sider that the syenites and diorites and hornblendic rock, were of 

 earlier formation than the ophites, calcite, crystalline limestone 



