258 Geology and Mineralogy of the 
ence or reading avails me, is unexampled. I refer to a rock 
which has induced the Canadian voyagers to give to the 
seis around the Missassaga river the characteristic appel- 
lation of “ Le Serpent.” 
The extent of this rock im any direction I have not as- 
certained. I first observed it on the northern mainland, 
fifteen* miles above the river Missassaga, and afterwards, 
for many miles towards the river Thessalon, when morasses 
and luxuriant forests conceal all traces of stratification, until 
we reach the nei Eghbortiond of the greenstone, about to 
described.+ 
It is an intermixture, in the large, of a light coloured 
greenstone, and a granitous compound of minute texture, 
fcohstsiing af white quarts and red feldspar, the latter being 
in excess.) stanees mutu enetrate and tra- 
verse each jai in nearly equal — so that either 
may be considered matrix or vein at pleasare ; and each is 
indicated externally by knotty, —_ waved, or stellular 
cudaearseene 9 its own proper color, which is lively and 
trongly cont: ys ins res. 
the direction of this “ Serpent rock is ndtih west, with 
a south west dip at an angle of 70°. Accompanying it, in 
the lake, a few granite cvenaids rise above the water, hold- 
ing a northerly course, an sel of the low level of the 
primitive rocks in 
We have here an instance of a third rock being formed 
peak ithe i Seige union of two others, pre-existing and co- 
smporane hich have met in the same state of fluidity. 
a fave esis eathled by violent agitation or strong cur- 
rents, to A iageast en into each other’s strueture in 2 
very equable m 
Its pen ys relations and its origin, place it among the 
transition class of roe 
asterly from this locality for twenty miles or more, por- 
cing granites, gneiss and alternate along shore in 
s forming islets, naked rocks and reefs, the granite ~ 
z 
*] was wind-bound for two sya there. 
among eteaipe, which circu vtitench dia to examine ; 
but from their brown color, close textu: oe ie 
trap: particalatly as ? eg c. “s pea the: them 2 
