SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 75, NO. 5, PL. 71 



Looking west from the "Fossil Bed" on Aluuiit Stephen. Tlie ih.stant ^uininit., ui tiiL \ an Horn K.i:i.;l .iix ..liowii ij:i iIk li^ht, and below, the Kicking Horse River. The cliffs of the northwest ridge of Mount Dennis rise from 

 the river and extend up to Dennis Pass. They are formed of Upper Cambrian shales and thin beds of limestone that are superjacent to the Middle Cambrian Eldon limestones of Mount Stephen. The broken down shales of the 

 " Fossil Bed " are finely exposed and at the top on the left layers of the shale occur in sifii. 



Locality. — At /' on map, i)late 26. The "Fossil Bed" is about 3,000 feet (914.4 m.) above the town of Field, British Columbia. 



