<U a. ii. DAWSON OS A Ni;\v 8i'i;cii;s uv 



iiess, however, wouiil appear from the fact that about soventoon 

 miles to the north-west they are seen forming a range of mountains, 

 which rise to altitudes of over loUO feet al)ovc the level of the neigh- 

 bouring valleys, and run I'lom near Kelly's Lake to Canoe Creek, 

 The (.'lysical rehilions of the beds will, iiowever, bo described at 

 greater lengtli in the next ]{eport of the Geological Survey. 



Though inclined to correlate tliese limestone beds, on stratigra- 

 phical and lithological evidence, with otliers from Avliich Carbonife- 

 rous forms have been ol)tained, no fossils more chariictcristic than 

 the joints of Crinoidal columns were for some time found iu associ- 

 ation Avith tlie Foraminil'er now desciibed. After some search, how- 

 ever, specimens of FKfii'liud were discovered, tlius 1)ringing these 

 into relation with the /<'»*'«///( a-bearing limestones found elsewhere 

 in the province, and also very widely over the western part of the 

 North-American continent . 



^[any loose fragments and boulders of Loftasid-Vimvutonc were 

 also found at " The I'ouutain," on the surface of a high terrace, there 

 overlooking the Fraser, This place is about nine miles south- 

 westward from the nearest of the ilarble-Canon ex]>osures ; and the 

 specimens here may have been derived from a distinct outcrop not yet 

 discovered. 



In certain beds of tho limestones of ^larble Caiiion, the Loftiisiu 

 occurs almost to the exclusion of other forms, characterizing the 

 rock, and having been the agent in its production, just as Fufiulin<v. 

 occur in the best examples of Fasidiua-Wmc^ionc or QlohUjcrinoi in 

 tho Atlantic ooze. Other beds of a nearly white colour and almos^t 

 ])orcellanous aspect on fracture— though purely calcareous— are 

 found on mierosco])ic examination to consist of the comminuted re- 

 mains of smtdler Foraminifcra, the mass resembling a thoroughly 

 Imrdened chalk. Through these a few more or less perfect Loftus'uK 

 may be scattered. FusuluHe appear to be very scarce in the Marble- 

 Caiion limestones ; they are much more abundant in those of other 

 parts of the country, composed principally of Crinoidal fragments. 

 They seem to have pi'cferred a bottom composed of the debris of tho 

 larger calcareous organisms to the fine oozy bed most congenial to 

 the Loftusid. 



The typical and most abuncttait form of Zq/V^Mrt-limestono is a 

 pale or dark grey cryptocrystalline rock, in which tho more perfect 

 specimens of Loftasia appear thickly crowded together as paler spots, 

 generally pretty shar])ly defined. The limestone breaks freely in any 

 direction, the fiacture passing equally through the matrix and in- 

 cluded organisms, which it is impossible to separate from the stone. 

 Tho matrix generally seems to be composed in great part of granular 

 calcareous matter similar to that employed iu building i p the test 

 of the Loftusia, but more irregular in size of grain, and with an oc- 

 casional fragment of a Crinoid or example of some smaller Fora- 

 minifer. When a F((sidina is found, even on the same thin section 

 with a Lofhisia, it dift'ers totally from the latter in appearance. Tho 

 fine tabulation of the walls has not been preserved ; but the calcite 

 is homogeneous and almost milky in appearance, while tho frag- 



