320 WALCOTT 



Seely Street Section. — The section exposed at the head of 

 Seely Street, beside the Park road, is as follows. The pre- 

 Cambrian Algonkian rocks have an uneven surface where the 

 basal beds of the Cambrian rest against them. 



Lower Caf?tbrjan^ upward. — Feet. 



la. Dark reddish-brown, fine conglomerate and sandstone, with 

 reddish and green, hard arenaceous shale. The con- 

 glomerate contains small quartz pebbles and bits of the 



subjacent Algonkian siliceous beds la 



Strike N. 40° mag., dip. 70° S. E. 



lb. Space concealed. From the abundant debris in the soil as 

 exposed in a cutting beside the road the section here is 

 formed of reddish-purple and green sandy shales 85 



ic. Reddish-purple and greenish arenaceo-micaceous shales 



and thin-bedded sandstone 52 



Middle Cambrian. — 



2a. Light-gray, fine-grained, quartzitic sandstone in thick 

 layers. The grains of sand become coarser in the upper 

 part of section and a layer of white quartz pebble con- 

 glomerate occurs near the summit 40~45 



Strike at base N. 55° E. mag., dip 70° S. E. 



2b. Arenaceous and argillaceous, greenish-colored shales and 

 thin-bedded sandstones, passing above into dark argil- 

 laceous shales. About 25 feet above the base the Para- 

 doxides fauna apjDears in great abundance. For further 

 details of the section of the St. John Cambrian rocks 

 see Mr. Matthew's papers. 



It will be noted that the strike of the basal Lower Cambrian 

 bed la is N. 40°, while that of the St. John quartzite is N. 55° 

 E. This does not indicate an unconformity, as the change of 

 strike occurs in the beds below ; the shales just beneath the 

 quartzite are conformable to the quartzite. 



Han/ord Brook Section, St. John County, New Brunszuick. 

 — The Middle Cambrian portion of the Hanford Brook section 

 as exposed at McAfee's saw mill, on the south bank of the 

 brook below the mill, is as follows : 



Middle Cambrian, downward. — Feet. 



I a. Greenish-colored argillaceous shales with abundant remains 

 of Paradoxides and other forms of the Paradox ides 

 fauna 30 -f- 



ib. Massive calcareo-argillaceous layer carrying the Para- 

 doxides lamellatus fauna 3 



Strike E. and W., dip 45° N. 



