110 Mr Jukes on the Geology of Newfonndiand. 



of rock forms hills four or five hundred feet high, in nearly hori- 

 zontal beds. Its upper part continues to be regularly bedded, 

 but in its lower portion all distinction into beds is lost, and the 

 limestone becomes perfectly white and saccharine. This great 

 mass of white marble is frequently crossed by grey veins, so that 

 I cannot say that I saw any block pure enough for the statuary. 

 There is little doubt, however, that, in so large a quantity, some 

 portions might be discovered fit for statuary marble ; and for 

 all other purposes to which marble is applied, the store is in* 

 exhaustible. 



On the north side of St George's Bay, there is a limestone- 

 formation, which I believe to be in the same situation as the 

 Humber limestone, with respect to the Port au Port shale and 

 gritstone ; but which differs in character so very much from 

 any beds I saw on the Humber, that I forbear to class it with 

 that rock without further evidence. It consists principally of 

 a light yellow magnesian limestone, having, however, interstra- 

 tified beds of grey carbonate of lime. The grey beds fre- 

 quently contain bands and nodules of chert or calcedony, and 

 the yellow magnesian beds are frequently marked with light red 

 concentric rings, which are sections of spheroidal bands of 

 colour, but which do not appear to differ, except in colour, 

 from the rest of the mass. These bands or rings are of rather 

 irregular form, something resembling the bands of colour in a 

 fortification agate, but being frequently three feet in diameter. 

 The following is the most complete section I could get ; but as 

 it was cut off* by the sea below, and concealed by the woods 

 above, it affords no criterion as to the total thickness of the 

 formation. 



Feet. 



Tliick-bedded light yellow magnesian limestone, 15 



Thin-bedded ditto, with horizontal pink stripes, and having part- 

 ings of indurated marl, 8 



Thick-bedded light yellow magnesian limestone, 10 



Thin-bedded pinkish-yellow ditto with light red concentric rings, 20 



Light grey limestone with a band of chert, & 



Yellow magnesian limestone, 2 



60 

 4. Mica-slate and Gneiss. — This formation, in whatever coun- 

 try it appears, is the lowest of the stratified rocks. Mica-slat© 

 is a laminated rock, made up of flaJkes of mica. Gneiss may 



