14 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 75 



Won AH Ouartzite: t- * tvt . 



-^ reet Meters 



I. Light gray to white compact quartzite in layers 3 to 10 feet 



(.9 to 3 m.) thick. (Estimate) no 33.5 



Strike N. 35° W. 

 Dip so ° N. 55° E. 

 A section measured about a mile to the northwest of Sinclair Mountain gave 

 the following : 



Feet Meters 



I. Massive-bedded, white and light gray quartzite. The basal 

 layer is a more or less cross-bedded indurated white 

 sandstone 2.5 feet (.7 m.) thick. The layer above is 18 

 to 22 feet (5.5 to 6.7 m.) thick, with another similar 

 layer above it; these two layers are almost homo- 

 geneous and were evidently formed of clear, white 

 beach sand. 

 Total thickness where measured 42 12.8 



Strike N. 65° W. Dip about 30° N. 25° E. 

 No traces of fossils were found at any of the exposures 

 of the quartzite. 



Disconformity : 



There is no physical evidence of unconformity beneath the quartzite, but the 

 Glenogle black shale formation of the Kicking Horse Canyon section with its 

 strongly marked Middle Ordovician graptolite fauna has not been recognized. 



ordovician 

 Sinclair Formation: f^^, ^^^^^^^ 



la. Thin layers of gray, reddish brown weathering sandstone 



passing into arenaceous shale 330 feet (100.5 rn-) down. 474 144-5 

 Fawna.— Numerous annelid trails and borings on and in 



some of the thin layers of sandstone. 

 Strike N. 55° W. Dip 40° N. 35° E. 



lb. Gray, hard, thin-bedded sandstone 43 13. i 



ic. Dark grayish black slightly and finely arenaceous shale. . . . 106 32.3 

 id. Light gray quartzite weathering buff gray 7 2.1 



Total of I 630 192.0 



2a. Dark finely arenaceous and silicious shale with occasional 

 thin layers of hard, dark arenaceous earthy rock and 

 a few lenticular concretionary nodules carrying grapto- 



lites 707 215.5 



Fauna.. — Noted fragments of graptolites 102 feet (31.0 m.) 

 below the summit in association with Caryocaris curvi- 

 latus Gurley; also at 417 feet (127.1 m.) and 572 feet 

 (174.3 rn-)- At 517 feet (157. S m.) the following species 



