Lae 
PAGE 
Pointe Claire and Ste. Anne-de-Bellevue......... 148 
St. Helen island: ..........455....55.2 eee 149 
Ottawa and viemity....4. 22.6) eee oe 150 
hulle og ee. cc eee eens ol oe ok eee 150 
Cummings Bridge... ..0..0 0.2.2) | eee 151 
Rockcliffe... wie. oc etal ik Ve or I51 
Mechanicsville. ......20.... 04. wed ee 152 
Governor bay... .....06f4... 0)... eee 153 
Chaudiere falls.......2¢5)5..... 33 154 
Parliament hill. .o.:.o5 2310.4. 2 eee 155 
Tétreauville and “The Heap)’........) 4.3 155 
Montreal road. ... 0... ...\..0: #3 eee 156 
Britannia and Westboro............... eee 157 
Aylmer and Queen's: Park... .. ... 1.0) eee 158 
Division street and Dow lake....... ....3335ee 159 
Hogsback « 0.0445. eite pce ol Oe 159 
Hawthorne: . . ....200. 6.22 so 3 ee 160 
VAIS. ova) ode See dlls a1 oy cee eee he oeecen cc 160 
INTRODUCTION, 
The great expanse of low, nearly flat land, which 
borders the St. Lawrence and Ottawa rivers for 200 miles 
(322 km.) above and below the mouth of the Ottawa, is 
underlain by strata of Upper Cambrian and Ordovician 
age. While the greater part of this area is covered with 
boulder clay or marine sands and clays of Champlain age, 
there are many exposures along and near the rivers, and 
good sections of all the Ordovician formations may be 
seen within a radius of 20 miles (32 km.) of either Mon- 
treal or Ottawa. 
TABLE OF FORMATIONS: 
ORDOVICIAN. 
Richmond Richmond. 
Lorraine Lorraine. 
Utica (Utica: 
\Collingwood (Ottawa). 
