NO. I FORMATIONS OF BEAVERFOOT-BRISCO-STANFORD RANGE I7 



of Sinclair Canyon ; the missing strata in the interval are filled in from the 

 Stoddart-Dry Creek section 5 miles (8 km.) to the south where the strata that 

 occur between the two faunules are 356 feet (108.5 m.) in thickness. 



2. Mons limestones and shales concealed by debris on Wonah 



Ridge 356 108.5 



The measured section is taken up again just below the first 

 bridge at the eastern end of the Gates of Sinclair Can- 

 yon, where a fault with a hade to the west brings the 

 massive limestones of the Beaverfoot formation against 

 and partly over the limestones and shales of the Hungaia 

 zone of the Mons. (See pi. 5.) 



3. The upper portion is formed of compact, hard gray and 



steel gray limestones in rather thin layers with bands of 

 calcareous shaly partings varying in thickness from a 

 millimeter up to several feet. About 200 feet (60.9 m.) 

 from the top the limestone is in layers from 2 inches 

 (5 cm.) to 2 or 3 feet (.6 or .9m.) thick and largely com- 

 posed of small irregular oval lumps and small bits of 

 limestone in a hard compact calcareous matrix, the ■ 

 whole forming a typical intraformational conglomerate. 1,030 313-9 

 Fauna. — At 170 feet (51.8 m.) below the top the Hungaia 

 faunule occurs in a layer of hard gray limestone, and it 

 wa^ found to continue down through 168 feet ('51.2 m.) 

 of shales and interbedded limestones. I found a single 

 pygidium of Hungaia in the upper layer where Dr. E. M. 

 Kindle of the Canadian Geological Survey collected 

 considerable material that includes two species of Hun- 

 gaia (2ie). 

 At the base of the Hungaia zone as now known, 168 feet 

 (51.2 m.) below 2ie, the faunule includes (locality 2if) : 

 LinguIeUa ibicus Walcott 

 Eoorthis putillus Walott 

 Hungaia sp. 

 Symphysurina sp. 

 Apatokephalus ? sp. 

 Xenostegium ? sp. 

 Hystricurus sp. 

 At 405 feet (123.4 m-) below the top the Symphysurina 

 fauna is abundant but badly broken up. Near the base 

 the following faunule was found (loc. i6q) : 

 Obolus ion Walcott 

 Obolus sp. undt. 

 Lingulepis nabis Walcott 

 Lingulella ibicus Walcott 

 Lingulella nepos Walcott 

 Syntrophia pcrilla Walcott 

 Acrotreta sp. undt. 

 Billingsella coloradoensis (Shumard) 

 Eoorthis putillis Walcott 



