10$ Mr Jukes on the Geology of Netvfoundland, 



tion is almost invariably of a very fine grain, but here and there 

 contains coarser beds, or even patches of small conglomerate. 

 The fine-grained beds are generally traversed by a slaty clea- 

 V2Lge, but, from their brittle character, seldom split into large 

 slates, and are never sufl&ciently durable to be used for econo- 

 mical purposes. Some of the beds are slightly calcareous. 

 The bright red colour generally characterizes certain b^ds, each 

 bed, or group of beds, being only of one hue ; sometimes, how- 

 ever, a sudden change takes place, the red colour ending in 

 one or more broad streaks, and the remainder of the mass 

 being greenish-grey. The colours are likewise in variable pro- 

 portions in difierent localities ; the predominating hue being 

 red in one place, green in another, and becoming in some places 

 brown, cream-coloured, or yellowish. The slaty cleavage is 

 most frequently developed in the upper part of the formation ; 

 the lower beds, though retaining something of their charac- 

 teristic colouring, are rather coarser, more siliceous, and become 

 compact slate-rock or gritstone. The total thickness of this 

 formation must certainly exceed a thousand feet. 



3. The Trinity Bay Sandstone-formation.^This is the rock 

 which usually occurs next below the variegated slates ; I can- 

 not, however, as yet state whether the two pass into each other 

 or not. The Trinity Bay sandstone-formation is composed of 

 materials of which the following section is an example : — 



Feet. 



1. Dull red sandstone or gritstone, containing a few pebbles, in 

 enormously thick beds, some being so much as 30 or 40 feet,... 400 



2. Alternating beds of coarse and fine grained rock, the finer beds 

 exhibiting an impeifect slaty cleavage, and the beds generally 



verj' thin, sometimes not more than three inches, 400 



{Dark red sandstone, \ 

 Light purple ditto, ( j^q 

 Dull red sandstone and conglomerate, C 

 Gritstone with a dull red and white stripe, / 



4. Greenish slaty rock, 50 



6. Dull red sandstone and conglomerate, 100 



C. A continued alternation of beds similar to 3, 4, and 5, for a 



thickness of at least 500 or 600 



1700 

 These gritstones and sandstones are generally hard and in- 

 tractable, having a dull fracture, and being not well adapted 

 for building purposes. The slaty beds are siliceous and the 



