79 
[Marcou. 
STRATIGRAPHY OF THE PROVINCE OF QUEBEC. 
Break. Unconformity. 
Silurian system. Some patches of Silurian deposits exist from 
Memphremagog to Gaspe. 
Cambrian 
or 
Champlain 
system. 
Break. Unconformity. — ■ 
( Utica, from Rouse’s Point to St. John lake. 
Fourth zone of graptolites. 
Trenton, including Chazy and Calciferous 
( not distinguishable as subdivisions from 
Chicot creek (St. Peter’s lake) eastward to 
Montmorency and Western Newfoundland. 
-Break. Unconformity, at Chazy andBeauharnois. 
Taconic series. 
§ 
Potsdam, does not exist round Trois Rivieres 
nor the city of Quebec, nor farther east. 
It exists only round Montreal as far north- 
east as St. Cuthbert in Berthier county. 
Break. Overturn of all the strata and 
strong unconformity. 
Citadel hill and Quebec city or Swanton 
slates. Third zone of graptolites and 
colonies. 
PoiNTE LfSVIS AND PlIILLIPSBURGH. Second 
zone of graptolites with compound grapto- 
lites. Colonies. 
Georgia, from Highgate (Vermont) to St. 
Denis, Bic Harbor, etc. ; first zone of grap- 
tolites. Olenellus belt. The homotaxis 
of the Paradoxides belt of northeastern 
America and Scandinavia. 
St. Albans, much developed on the Chau- 
diere river and around Actonvale and Rich- 
mond. A few Olenelli exist east of St. 
Albans, west of Shelton, and in the gran- 
ular quartz. This formation represents the 
Olenellus bed of Cape Breton, Eastern New- 
foundland and Scandinavia. 
The doctrine of colonies has been established by Barrande on 
practical facts, studied most carefully in the field, without any re- 
gard to and indeed against the uniformitarian rules established too 
hastily by the palaeontologists. Barrande reminded palaeontolo- 
gists, that stratigraphy comes first, and is the foundation on which 
lies the whole structure of geology. His discoveries in Bohemia 
have the great merit of placing facts before theories. 
