134 Lieut. Baddeley on the geognosy 
This trilobite is upon very schistose limestone, of a dark grey 
color internally, and yellowish white weathered surface. The 
fragment in which it was found is angular and detached ; it had 
been used as a stepping stone to one of the outhouses at the 
Post, and probably had been brought by the ice to this shore 
from a place on the lake about three miles to the westward, 
where we found a limestone very similar to it, having a variable 
dip to the northward of from 10°. to 45°. and underlying 
a very schistose black limestone containing the impressions o 
small terebratule, and giving out a very fetid odour when struck. 
Although schistose in the large, this latter rock was very com- 
pact in the small, and would probably afford beautiful black 
slabs of marble. ‘The schistose character, together with its 
black color, might occasion it to be mistaken for clay-slate, 
particularly as we have before described that rock as holding 
a similar position with regard to the limestone ; but that posi- 
tion itself, the violent effervescence of the rock in acid, its im- 
bedded organic remains and fetid odour, remove all doubt on 
the subject. The fawn coloured limestone was again observed 
here ; it appears to be in considerable abundance. A large an- 
gular mass of white laminar marble was seen upon the shore ; 
the rock itself must be near but probably at the bottom of the 
Jake, from whence the mass in question has been thrown up. 
From the Post of Mitabetshuan, conceived to be the most 
southerly point of the lake or nearly so, the River Peribonea, 
about its most northerly point, bore north—La Grande De- 
charge, N.E., and nearest point to the eastward, E. 
We ascended the Metabetshuan River a short distance as far 
as some rapids ; the right bank or that to the eastward, was 
found to be composed of a mixture of clay and sand, forming an 
alluvial ridge from fifty to eighty feet high. The western side 
of the river is low. Wheat, barley, oats, kitchen stuff of va- 
rious kinds, cucumbers and melons, grow here to perfection ; 
neither 
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