Miles and ~ 
Kilometres. 
164-3 mi: 
263 km. 
jG/2he lemme 
276-5 km. 
175 m. 
280 km. 
£76.09 m. 
283 km. 
108 
East Templeton—Alt. 159 ft. (48-4 m.). 
Ottawa gneiss of a granitic character is much 
cut up here by pegmatite and quartz. veins, 
which are easily seen from the railway. A short 
distance farther west the top of the Potsdam 
scarp can be seen on the left hand, between the 
railway and the Ottawa river. » 
The Gatineau river is crossed about two miles 
above its junction with the Ottawa. 
Hull—Alt. 189 ft. (57-5 m.). Before reach- 
ing Hull, quarries in the Trenton limestone are 
passed, which admirably display the character 
of this formation in the vicinity of Ottawa. 
The other members of the Ordovician are not 
exposed along the railway. 
Ottawa (Broad St.)—Alt. 175 ft. (53.3 m.). 
Hull—Alt. 189 ft. (57.5 m.) ‘The railroad 
crosses the Ottawa river a half mile (.8 km.) 
above Chaudiére falls and runs north along the 
west bank of the Gatineau river which debouches 
into the Ottawa at Hull. Chaudiére falls and 
the gorge below are in Trenton limestone, 
which underlies the north and west parts of the 
city of Ottawa. To the east and south-east, 
Utica shale, having an estimated thickness of 
400 feet (112 m.), conformably overlies the 
Trenton. It has yielded Trzarthrus beck1, Green, 
Isoielus canadensis, Leptograptus flaccidus, Hall, 
Orthograptus quadrimucronatus, Hall, and many 
other Utica fossils. A half mile (.8 km.) west 
of the railway bridge across the Ottawa, the 
Trenton series is terminated by the Hull and 
Gloucester fault which, starting in the vicinity of 
Rigaud, runs west toward Ottawa for a distance 
of 65 miles (104 km.), then curving toward the 
north crosses the Ottawa river at this point and 
Gatineau river about Ironsides village. Imme- 
diately west of the fault near the Ottawa river 
the Trenton is succeeded by Black river lime- 
stone, with the Chazy series still farther west. 
All the Paleozoic sediments in the vicinity of 
Ottawa are nearly horizontal, except near faults 
