NO. S 



s.\iiTiiS(j.\iA.\ i:.\rL(;K.\Ti().\s, 1913 



9 



Uinil)liii.iL;' down iIk- slopes ( fij^". 5) and ottt'n disa|)])car Ixjncatli llir 

 i^lacicr to ri.'ai)])car at its toot with tin- volnnic ot a river ( Hg. 8j. 



At I'ield, llritish ( olumhia, work was continnc-il at the great C'ani- 

 hrian lossil <|narry, where a large eolleti ion ot spi'einiens was secured. 

 The (•onditi(tns were sneli tlial it was necessary to do nnieh heav\' 

 hlasling to reacli tlie linest tossils which occur in the lower layers 

 ()\ r(K'k. JMgure 10 shows the north end oi the ({tiarry helow the sharp 



I- 1',. II.- S'lUtli cii'l ''l' iM^sil (|uarry. wIutc- many of tlic itK)sI hcautiful 

 specimens were secured from the lower three feet of 1)eds. Near Field, British 

 Columbia, Canada. Photograph ])y C. D. Walcott. 191.3. 



summit of Mount Wapta, and, in the distance, the President Range 

 with lunerald Lake at its hase. 1"he south end oi the quarry is illtts- 

 trated hy figure 1 I ; here the solid heds were blasted rjul to a depth of 

 22 feet. 



Owing tf) tlie ])resence of a fault line, just north of the fjuarry, 

 and the twist and comjjression of the rocks sotith of it, the availahle 

 area for successful collecting is limited to about 200 feet. In other 

 localities where the shale fjutcroijs on the ridges in the vicinity, com- 



