D E S (! R IPTI VE CATALOG- U E. 



223 



2. Metamorphosed siliceo-argillaceous slate — black ; minutely granular, with fine 

 glistening points ; jointed ; resembles some of the basaltic dikes. 



3. Clay-slate, much altered, but shows the laminar structure distinctly, — black; 

 no traces of a crystalline structure ; no glistening points as in No. 2. 



4. Siliceous slate — greenish gray; in near contact with the greenstone dike, is 

 changed to a schistose quartz rock, which, in some of the layers, is granular. 



5. Greenstone, coarsely crystalline ; weathered surface rough, iron-shot; colour, 

 dark greenish gray. 



6. Quartzose sandstone — fine granular; colour, brick-red; resembles some of 

 siliceous schists. 



7. Quartzose schist — greenish gray ; granular in thin laminae ; resembles the 

 slaty greenstones of Kinuhigakwag Creek. Iron stains between the lamince, and in 

 the joints. Makes a near approach in some layers to hornblende slate. 



8. Clay slate, alternating with the quartzose layers. 



9. Hornblendic rock — bedded and jointed like the overlying schists ; layers from 

 an inch to an inch and a half thick. Colour, grayish black ; minutely crystalline. 



10. No. 0, passing into greenstone ; more coarsely crystalline than No. 9 ; but 

 evidently the same rock. Dark greenish gray ; compact ; weathers with a thin, 

 grayish, iron-shot crust, nearly white externally, contains much yellow iron pyrites. 



11. Greenstone. 



12. Clay-slate — rust}^ surfaces between the joints ; fracture smooth ; lustre dull ; 

 no glistening points ; no appearance of crystallization. 



13. Hornblendic schist — finegrained; bluish green; light gray on exposed sur- 

 faces ; dark brown in some places ; irregularly laminated ; in some spots rather 

 compact. Intercalations, of a reddish-coloured jasperoidal rock. 



14. Granite — light-coloured, gray, mottled ; fine-grained; compact; gneissoid. 



15. Hornblendic rock — highly crystalline ; green; resembles diallage rock. 



16. Same as No. 15. 



17. Hornblende rock — coarsely crystalline; dark-coloured, almost black. 



18. Slaty hornblende — with seams of iron ore. Some of the beds are siliceous, 

 and resemble the quartzose schists, but are highly ferruginous. 



19. Quartz rock. 



20. Hornblendic rock — fine-grained; grayish-coloured; resembles No. 10. 



21. Syenitic granite. 



22. Slaty hornblende — with intercalations of hornstone. 



23. Siliceous slate — chloritic. 



24. This rock is syenitic in the mass, and should be placed among the granitic 

 rocks. It is composed of quartz and hornblende in about equal proportions. Some- 

 what fine-grained. It merges into a hornblendic rock. 



25. Clay-slate. 



26. Syenite — passing into greenstone. 



27. Porphyritic greenstone. 



28. Hornblendic rock — dark-coloured; fine-grained; crystalline. 



29. Slaty greenstone — minutely crystalline. 



