558 Professor Emerson on HalVs Geological Collections. 



24. Granite. 



Ill several packages, without special labels, and coming probably from 

 Field and Grinnell Bays, there were above a dozen specimens of the same coarse 

 orthoclase-lepidomelane granite as 23, showing it to be very prevalent. In fact, 

 many of the descriptions ot rocks given by Hall wiU apply only to granite, and, 

 taken in connection with the specimens collected, its wide distribution is placed 

 beyond doubt. 



Thus in his first excursion in Frank Clark Harbor, on the south side of Cor- 

 nelius Grinnell Bay, after mentioning prominent veins of white quartz, Hall 

 says : " The rocks about here were indeed very remarkable. One pile consisted 

 entirely of mica, quartz, and feldspar, and the nearest approach I can give to its 

 appearance is to let the imagination conceive that the feldspar was in a state 

 like puttj'^, and worked up into various uncouth figures, the spaces between each 

 being filled up with mica and quartz. Then would there be an appearance to 

 what I observed on these rocks, only that ages and ages should be added to cut 

 out deeply the mica and quartz [stands thus in the original], leaving the i)ure 

 <iuartz veins unafiected." p. 112. 



At Point Tik-koon, in Countess of Warwick's Sound, he mentions " granite, 

 the usual high old rocks." 

 2.5. Granite. 



In a large package labeled simply "Azoic Eocks, Frobisher Bay," and con- 

 taining many fragments of Silurian limestones and schistose rocks, there were 

 also many fragments of quartz and feldspar, which manifestly came from a very 

 coarse granite of a much lighter color than that last mentioned. 



26. Granite. 



Coarse red feldspar granite exactly like 25. 

 Locality, Kuen-gum-mi-ooke. 



27. Granite. 



A typical fine-grained granite of deep red color, (xray, granular quartz 

 slightly more abundant than the deep tlesh-red orthoclase. The latter in rounded 

 crystalline grains. Dark green mica in minute scales and pyrite in small quantity. 



Locality, Frobisher Bay. 



28. Pegmatite. 



Two specimens showing deep flesh-red orthoclase scattered in irregular 

 crystalline masses through gray quartz, the quartz greatly predominating. 

 Frobisher Bay. 



