THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE IV. VOL. X. 



No. VII.— JULY, 1903. 



o:EiTG-xj>rj^iL. .iLie.TiGx.:E]S. 



I. — Notes on Specimens collected by Professor Collie, F.E.S., 

 IN THE Canadian Kocky Mountains. 



By Professor T. G. Bonney, D.Sc, LL.D., F.H.S. 

 (PLATE XVII.) 



THE most interesting series of specimens in this collection comes 

 from Desolation Valley glacier, on the southern side of the 

 Canadian Pacific Kailway, and east of the watershed. These are : 

 (1) A roughly pentagonal slab, about 9|" by 7" and from f" to 1" 

 thick, of a rather fine-grained quartzite, with some minute glittering 

 crystals, but giving little or no effervescence with cold H CI. The 

 surface is crowded with wavy cylinders,^ generally slightly flattened, 

 varying in diameter from about -55" to '15" (but commonly about "55"). 



Fig. 1. — Burrows ou quartzite slab, about one-tbird lineaj.' of original size. 



Externally they are rather smooth, and I think slight indications of 

 a 'shell' can occasionally be detected, perhaps about one-twentieth 

 of an inch thick ; others seem to consist wholly of white quartzite, 

 apparently a little purer than that of the underlying slab, but as 



1 The markings in all these specimens, unless expressly stated, are in reUef . 



DECADE IV. — VOL. X. NO. VII. 19 



