NO. 5 PRE-DEVONIAN PALEOZOIC FORMATIONS 367 



Feet Meters 



id. Black banded and blue-black thin-bedded and massive 



limestone (27 of section) 250 76.2 



Fauna. — (17-129) : 



Apatocephalus sp. 

 le. Rusty yellow-weathering series of massive limestones, 

 with upper 115 feet (35.1 m.) yellow and arenaceous 

 (26 of section) 250 76.2 



Total thickness 875 266.7 



UPPER CAMBRIAN 

 Lynx Formation 



la. Irregularly-bedded and more or less lumpy, hard, bluish 



limestone (22-25 of section) 355 108.2 



Fauna. — Drift near base on slope (17-127) : 



Dikelocephalus sp. 

 lb. Massive-bedded, blue-gray limestone, with pockets of 



rusty arenaceous and dolomitic rock (21 of section) . 200 61.0 



No fossils, 

 ir. Pinkish- and purplish-gray arenaceous limestones (14-20 



of section) 345 105.1 



No fossils, 

 irf. Dirty gray, cliff-forming limestone (Nos. 12 and 13 of 



section) 545 166.1 



le. Thin-bedded and shaly limestone interbedded in more 



or less calcareous shale (4- 11 of section) 654 199-3 



if. Greenish shale series, with nodules and some limestone 



bands 666 203.0 



Fauna. — ^A considerable number of fossils were collected in 

 divisions le and if, but all are new genera and species ; 

 the only recognizable form being Kingstonia. 

 2. Massive series of blue limestone ( I of section) .Estimate 200 61.0 



Fauna. — (17-133). Also Walcott (62b). 



Total of Lynx 2,965 903.7 



Total 3,840 1,1704 



Titkana Peak Section 



Titkana Peak rises 3,600 feet (1,097.3 ^•) above Lake Adolphus, 

 and the layers of limestone forming it have a slope to the southwest 

 of nearly 20° (see pis. 94, 104), and from the southeast end of 

 Lake Adolphus to the summit of the peak, the slope of the beds (diag- 

 onally across the dip of 20° southwest) is about 15° for a distance 

 of 2 miles (3.2 m.), which carries the lowest layer exposed near the 

 lower end of the lake 2,824 feet (860.8 m.) below the level of the 



