64 Geological Survey of Canada, 



Feet. 



1. Green altered slates of a chloritic character, 1000 



2. Greenstone, , 400 



3. Greenish silicious slates, interstratified with pale greenish 



quartzite, 1200 



4. Slate conglomerate, 1000 



5. Limestone, 250 



6. Slate conglomerate, 800 



7. Dark blue or blackish fine grained slates, with dark grey 



quartzite, 500 



8. Whitish or whitish-grey quartzite, passing into quartzose con- 



glomerate with blood-red jasper pebbles, 1000 



9. Greenstone, 700 



6850 

 The copper veins appear to be confined, at least in their more 

 productive portions, to the greenstone bands. The limestone 

 occurs at the shore near the Bruce Mine, in the rear of the same 

 location, and in a long band extending along the Thessalon River, 

 and thence across E<mo Lake and to the north shore of Little 

 Lake George. 



Mr. Richardson's work lay in the Peninsula of Gaspe, and had 

 for its object the ascertaining of the precise boundaries of the 

 Lower and Upper Silurian and Devonian rocks, with the view of 

 accurately delineating these in the forthcoming geological map. 

 The. details of the coast sections on most parts of this peninsula 

 were very carefully worked out many years ago by Sir William 

 Loo-an, as we have had occasion to know b} T following his footsteps, 

 bed by bed, over some parts of the coast. Mr. Richardson had 

 to run lines of section across the country, and trace out the ex- 

 tension inland of the beds seen on the shore. His sections and 

 map accordingly give a very clear idea of the general structure 

 of the fossiliferous rocks of Gaspe. The Gaspe sandstones of 

 Devonian age, which contain the remarkable fossil plants re- 

 ferred to in another page of this number, form a long trough 

 extending through Gaspe Bay, and reaching, with few interrup- 

 tions, nearly as far as the valley of the Magdalen, a distance of 

 fifty miles. They rest on the great limestone of Cape Gaspe, 

 probably Upper Silurian, and this again is placed unconformably 

 on the edges of sandstones, conglomerate, limestone, and shale, 

 belonging to the Middle and Lower Silurian, which form the 

 long ranges of cliffs extending westward from Cape Rosier. The 

 plant-bearing Gaspe sandstones thus rest on the limestone, exactly 



