361 
[Marcou. 
tinct series lumped together” is an assertion contrary to plain fact 
and an error of Mr. Selwyn. 
“The Trenton limestone is nowhere, in its entire course of hun- 
dreds of miles, seen resting on anything resembling this supposed 
older formation.” I have given, close by the city of Quebec, the 
section from Charles river to Charlebourg, showing that the Tren- 
ton limestone at the Tresplat, rests upon older slates of the Citadel 
Hill and Quebec city formation (see Memoirs Boston Soc. Nat. 
Hist., vol. iv, pi. 13, 1887). It is very easy at that place to see 
on what rocks the horizontal Trenton limestones lie ; and I have 
asked Mr. Selwyn to have an excavation or two made just at the 
foot of the little plateau formed by the beds of the Trenton limestone 
overlooking the church and the village of Charlebourg, but he has 
not answered my request up to the present time. I have explained 
in my paper ( Canadian geological classification for the province of 
Quebec , p. 71) how it came about that erosion and denudation have 
reduced to extremely limited dimensions the Trenton limestone, 
and I shall not repeat it. 
Fifth question: “If there is no fault, as indicated by me between 
Levis and the citadel, why do the Levis beds not reappear with their 
characteristic fossils on the Quebec side directly towards which 
they are striking?” 
Reply : At Pointe Levis where the lenticular masses of limestone 
with their characteristic fossils exist, the beds do not strike directly 
toward the Quebec side ; on the contrary they strike in the oppo- 
site direction or east-east-south. That a fault exists, as indicated 
by Mr. Selwyn, between Levis and the citadel in the bed of the St. 
Lawrence river, is a supposition which nobody can prove, and has 
“no basis of fact” to support it. If Mr. Selwyn is “able to discern 
the evidence of a fault” as he claims, he will have to point it out 
somewhere else than in the middle of the bed of the river St. 
Lawrence. 
Sixth question: “Would Mr. Marcou state where I have ever 
called the break synclinal ?” 
Reply : On page 3 of The stratigraphy of the Quebec group , by 
A. R. C. Selwyn, 1879, Mr. Selwyn says, “a broad cramped and 
folded synclinal.” 
Seventh question: “When did I say, or even imply that I could 
‘almost point out what part of the northern coast of the St. Law- 
rence and Labrador they came from as boulders ?’ ” 
