Miles and 
kilometres. 
Fy 
27° 
46: 
74° 
41 
3m. 
8 km. 
-Om. 
-O km. 
-Om. 
-2 km. 
22101. 
-8 km. 
“7m. 
-O km. 
<P 
-4 km. 
Ei. 
2 km. 
19 
Ste. Rose—Alt. 85 ft. (25-9 m.). Just before 
reaching this point the Chazy limestone is 
succeeded by the underlying dolomitic limestones 
of the Calciferous. The line crosses the Riviére 
des Milles Iles, another branch of the Ottawa, 
which to the east becomes confluent with Back 
river before the latter reaches the St. Lawrence. 
Rosemere—Alt. 91 ft. (27-7 m.). 
Ste. Thérése—Alt. 120 ft. (36-6 m.). Lines 
leave here for Ottawa and St. Eustache. 
St. Janvier—Alt. 217 ft. (66-1 m.). 
Montfort Junction Alt. 262 ft. (79-8 m.). 
The Canadian Northern railway crosses. 
St. Jér6me—Alt. 308 ft. (93-9 m.) Just 
before arriving at St. Jér6me the margin of the 
Laurentian protaxis is reached. The Palzeozoic 
probably comes against the Laurentian here 
along a line of fault. At this point the abrupt 
rise of the Laurentian plateau is not so distinct 
as elsewhere in this district, owing to the fact 
that the North river here issues from the Laur- 
entian country, running in a rather wide valley 
up which the railway takes its course. At St. 
Jérdme, however, the character of the country 
undergoes an abrupt change, the rough and 
broken surface of a gabbro intrusion in the 
Laurentian succeeding the level surface of the 
Paleozoic plain. 
Shawbridge—Alt. 599 ft. (186-6m.). The 
country rises and becomes rolling, showing the 
roche moutonnée surfaces of the Laurentian 
protaxis. Cliffs of gneiss are seen to the right. 
The railroad follows the valley of North river 
which is filled with drift and shows well defined 
terraces on either side of the stream. Fine 
sections are seen at intervals. 
Piedmont—Alt. 552 ft. (168-2 m.). The 
Laurentian gneisses are here cut through by 
the Morin anorthosite. The actual contact, 
however, is concealed by heavy drift. 
32224—25 
