SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 75, NO. 5, PL. 6f 



East side of Sherbrook Ridge west of Mount Bosworth. The summit of the ridge at (a) is formed of Hmestones that may be referred to 

 the Upper Cambrian Sherbrook formation ; the latter extends down nearly to the foot of the cliffs, where the upper limestones of the Paget 

 formation are exposed.' The dolomitic limestones and shales of the Bosworth formation extend from Buff Point to the base of the cliff below 

 Red Knob. A little west of Buff Point a fault with a downthrow to the west has dropped the base of the Paget formation about 500 feet (152.4 m.). 



Locality.— At Q on map, plate 26. About 1.5 miles (2.4 km.) north of Hector Station, British Columbia. 



'The legend of plate 19, Smithsonian Misc. Coll., Vol. 53, 1908, tentatively refers the limestones forming the ridge at (a) to the Ordovician. 



