298 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 75 



Feel Meters 



2. Dark gray, siliceous slialc, with intcrbcddcd hard gray 



siliceous limestone 17 S-- 



No fossils observed.' 



3. Gray, buff-weathering, siliceous shales 45. 13.7 



4. Banded, greenish, siliceous shales, very hard, with hard, 



linely arenaceous, thin layers alternating at intervals 



of .5 to 2 inches (1.3 to 5 cm.) 190 57.9 



No fossils observed. 



5. Hard, calcareo-arenaccous, greenish, drab-weatlicring 



shales, forming massive layers 315 96.0 



Fauna. — (62x) : 



Gogia prolifica Walcott 



6. Hard, dark gray to black, siliceous shale, weathering 



luitY, and sometimes chocolate-colored bands 195 59.4 



Total measurctl Mount Whytc formation 785 239.2 



St. Piran Formation 



1. Massive-bedded, light gray compact quartzite 235 71.6 



2. Thin-bedded, gray quartzite, with some shaly partings. 290 88.4 

 Fauna. — Several large imperfect trilobite heads (Olcncllus) 



were noted on a thin slab of ([uartzite. 



Total St. Piran formation 525 ido.o 



Lake Louise Shale 



I. Dark, siliceous shale forming a well-marked band in 



the cliffs 70 21.3 



Fort Mountain I-'ormation 



1. Massive-bedded, compact gray (luartxite 480 146.3 



2. Basal conglomerate in several layers, the bottom one 



18 feet (5.5 m.) thick 4b 14.0 



Total luirt Mountain formation 526 1O0.3 



Unconformity 



PRF.-CAMBR1.\N 



Dark, siliceous, hard shale, about 10 feet (3 m.) exposed 

 just above south end of Gog Lake. The upper surface 

 of the shale shows erosion, but in the 40 feet (12.2 m.) 

 of exposure, the strike and clip of the shale and super- 

 jacent Camlirian conglomerate appear to be about the 

 same. 



' Frequent snow-squalls made it almost impossible to search for fossils in 

 this portion of the section. 



