2l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 55 



Bosworth, the total thickness of the St. Piran formation is 2,705 feet. Below 

 the St. Piran the following section occurs : 



LAKE LOUISE FORMATION [Walcott, 1908a, p. 5] : 



Feet 



I. Compact, gray, siliceous shale 105. 



Fauna: 



Annelid trails. 



Cruziama. 



Micromitra (Iphidella) Ionise Walcott [ipoSrf, p. 56]. 



FAIRVIEW FORMATION [Walcott, 1908a, p. 3] : 



I. Thin and thick layers of gray, quartzitic, brownish weathering, 



compact sandstones (estimated) 600-h 



This formation is much thicker to the southeast. 



RfiSUMfi, MOUNT BOSWORTH SECTION 



UPPER CAMBRIAN. 



SHERBROOKE FORMATION: 



Feet Feet 



1. Gray, partly cherty limestones 175 



2. Oolitic limestones and shaly band 590 



3. Arenaceous dolomitic limestone 610 



Total 1,375 



PAGET FORMATION: 



1. Massive bedded bluish gray limestone 60 



2. Oolitic limestone with bands of shale 300+ 



Total 360+ 



BOSWORTH FORMATION: 



1. Gray, arenaceous, dolomitic limestone 600+ 



2. Shaly and thin-bedded, dolomitic limestones with 



two bands of shale 987 



3. Shales 268 



Total 1,855-1- 



Total Upper Cambrian 3,590-h 



MIDDLE CAMBRIAN. 



ELDON FORMATION: 



1. Siliceous and arenaceous limestone 788 



2. Bluish gray limestone 95 



3 and 4. Arenaceous limestone 1,845 



Total 2,728 



