322 WALCOTT 



Feet. 



30 



ic. Reddish and greenish arenaceous and argillaceous shales 

 and thin-bedded sandstones, with a few thin interbedded 

 calcareous sandstones 



Strike N. 65° E, dip 35° to 40° N.W. 



Fossils : 



In a thin reddish-brown, slightly calcareous sandstone 

 occur great numbers of a slender species of Hyolithes 

 that resembles H. cotnmufiis. Just below it I noted, in 

 a hard, very fine-grained, compact sandstone, specimens 

 of Coleoloides like C. typicalis and a large Iphidea la- 

 bradorica? This appears to be the horizon of the 

 Hyolithes limestone fauna of the Smith Sound section 

 of Newfoundland. Unfortunately the sediments are of 

 a type in which fossils are rarely found well preserved. 



2. Reddish-purple conglomerate in fine sandstone matrix. 



White quartz and reddish and greenish siliceous pebbles 

 occur, some of which are from 2 to 6 inches in diameter. 31 

 Strike N. 6s° E., dip 40° N. W. 



3. Reddish-purple to grayish-purple, fine-grained sandstones, 



passing below into flaggy gray and greenish-gray mica- 

 ceous sandstone, interbedded with thick layers of sand- 

 stone 395 



About 120 feet down a few layers of white quartz pebbles 

 appear in the dark sandstone, and at 175 feet down 

 broad annelid trails were seen on the smooth surface of 

 a thick layer of sandstone. 



The dip decreases from 40° at the top to 30°, and then 25° 

 at the base, where the strike is N. 55° E. 



At this point the upper beds of the basal conglomerate out- 

 crop on the south side of the brook, but they are cut off 

 a few feet down by a fault that brings up some of the 

 beds of No. 3 of the section, and possibly No. ic. On 

 the north side of the brook a syncline and fault expose a 

 considerable portion of No. 3 of the section. Up the 

 brook the basal quartzite appears again beneath the 

 sandstone of No, 3, from which it extends nearly to the 

 contact with dark, pyroclastic, andesitic rocks of the Al- 

 gonkian. 



4. Rather coarse siliceous, massive-bedded conglomerate, 1 28 



formed of white quartz, jaspery, reddish- and greenish- 

 colored pebbles. The upper 8 feet has a light-gray 

 color that passes below to a purplish tint 



Total of Lower Cambrian 1040 



The contact with the Algonkian rocks is not seen, the base of the 

 conglomerate being considered as near the last angular boulders of 



