207 
[Marcou. 
1891.] 
degrees — almost perpendicular. That landslide must be quite 
recent when compared with the landslide of the eastern ravine 
previously described and given in fig. No. 3. 
Charlebourg. — I have already given the section of the road 
from the city of Quebec to Charlebourg (“ The Taconic of 
Georgia and the report on the geology of Vermont” ; Mem. 
Boston Soc. Nat. History , vol. iv, plate 13, 1888) showing local 
folding and small local faults. From Charles river to the Tr&s- 
plat, there is a great mass of slates, dipping south-easterly at an 
angle of forty to sixty degrees, of a thickness of at least 2,500 
feet, more probably 3,000 feet, belonging to the Swanton slates of 
the Upper Taconic. I did not find any fossil during my re- 
searches ; but the stratigraphic position of those slates above the 
Point-Levis great group, and their lithological structure, showed 
them to be the equivalent of the Swanton slates of Vermont. 
The little plateau of the Tr&splat above the village of Cliarle- 
bourgis formed wholly of horizontal strata of the Black river lime- 
stone or Lower Trenton, lying in discordance of stratification 
over the Swanton or Quebec-city slates. Lately Messrs. Giroux 
and Ami of the geological survey of Canada have found, be- 
tween Charlebourg church and Tr&splat, a tongue of Utica slates 
containing : Triarthrus Becki, Primitia , Bellerophon and Stro- 
phomena. That tongue of Utica slates seems to extend one mile 
eastward, as far as a small brook. It is another example of land- 
slide of the bituminous slates of the Utica group, brought about 
by a process of denundation and destruction, followed by a slide- 
down, with the usual result of a tongue of Utica, inclosed in or 
covering the Upper Taconic slates. ( u Second report on the geol- 
ogy of a portion of the province of Quebec,” by R. W- Ells, p. 
20 K, in Ann. Report Geol. Surv . Canada , 1887, Montreal, 1888.) 
Indian Lorette. — The bed of the Charles river at the fall 
and down the rapids is occupied entirely by the same quartzite as 
at Montmorency fall and river ; only the strata are not so thick 
being only half a foot, or one foot — very seldom three or four 
feet of thickness. On the right side of the river (fig. No. 4) and 
consequently westward of the village, overlying the quartzites, 
there is a deposit of fifteen feet of calcareous sandstone, reddish 
and very finely grained, representing the Calciferous and Chazy, 
which forms a sort of gigantic step between the perpendicular 
wall of Black river-Trenton limestone and the gorge of quartzite 
