NO. I FORMATIONS OF BEAVERFOOT-BRISCO-STANFORD RANGE 1 5 



(locality 2ig) were readily identified by Dr. R. Ruede- Feet Meteis 

 mann as extremely closely related if not identical 

 species to : 



Trigonograptus ensiformis (Hall) 

 Didymograptus caduceus nanus Ruedemann 

 Phyllograptus anna ultimus Ruedemann 

 cf. Dichograptus octobrachiatus (Hall) ; only 



fragment of branch 

 Caryocaris curvilatns Gurley 

 A mile to the northwest a small collection from the same 

 bed of shale but probably a lower zone than that of 2ig 

 included the following genera and species as identified 

 by Dr. Ruedemann. (Locality i6x.) 



Didymograptus cf. spinosus Ruedemann 

 Didymopraptus sp. (fragment) 

 Phyllograptus (cf.) ultimus Ruedemann 

 Glossograptus cf. hystrix Ruedemann 

 Cliniacograptus cf. pungens Ruedemann 

 Diplograptus cf. dcntatus Brongniart 

 " Of the species cited above, all occur in my bed 7 of the" 

 Deepkill section (top of the Deepkill shale) except Did. 

 spinosus which is found in a lower horizon at the Ash- 

 kill quarry at Mount Moreno near Hudson, N. Y. This 

 bed belongs to the base of the zone with Dipl. dcntatus. 

 The form from the Sinclair Canyon zone is a larger and 

 probably different species." (Ruedemann.) 

 In the lower portion of the Sarbach formation at Fossil 

 Mountain, 8.7 miles (13.9 km.) northeast of Lake 

 Louise Station on the Canadian Pacific Railway, a few 

 graptolites were found in a compact hard gray lime- 

 stone. Dr. Rudolf Ruedemann identified two forms, 

 Phyllograptus ilicifolius Hall var. major Ruedemann, 

 Didymograptus sp. nov. {paciUcus Ruedemann). He 

 wrote that the faunule may be of Beekmantown 

 (Canadian) age. 

 2b. Band of dark silicious, impure, almost black, limestone that 

 breaks down on weathering slopes into shales and very 



thin layers 28 8.5 



2c. Arenaceous and silicious shale that gradually passes about 

 55 feet (16.7 m.) above the base into grayish black 

 argillaceous shale with thin interbedded layers of 

 limestone 290 88.4 



Total of 2 1,025 312.4 



Total of Sinclair formation 1,655 504.4 



See Sinclair formation, p. 34. 



Observations. — In thin-bedded gray and more or less arenaceous and silicious 

 limestones that occur near a fault about half way between the second and 

 third bridges from the mouth or Gates of Sinclair Canyon, a fauna occurs that 

 2 



