426 DALE— CAMBRIAN MANGANESE DEPOSITS OF [April 25, 



The following section as prepared by Prof, van Ingen and Mr. A. 

 O. Hayes from their study of the region in 1912 shows the strati- 

 graphic relations of the manganese deposits at this point (Figs. 

 39 and 42). 



Loc. Number. Ft. 



212 A 14 Green shales, end of needles 50-0 



13 Paradoxides zone, green shales i.o 



212 A 12 b Green shales 75-0 



12 a Manganese zone (4.5 ft. best) 15.0 



II Red shales, thin band 3.0 



10 Green shale 60.0 



9 Red shale 210.0 



8 Red shaly limestone 11.6 



7 Red shale 28.0 



6 Limestone, heavy white at base, nodular and red above. 



Holmia broggeri and other trilobites 30.0 



5 Red shale 5.0 



4 Limestone, very shaly 12.0 



3 Red shale 32.0 



2 Limestone with Cryptozoon 30.0 



I Red shale with local sandstone and conglomerate 50.0 



Unconformity. 



o Pre-Cambrian shale and ash beds. 



The striking feature of this section is the position of the man- 

 ganese zone in relation to the Paradoxides bed which is exactly the 

 relation established at Manuels and undoubtedly at the other locali- 

 ties described. 



Smith Sound Section, Trinity Bay. — The manganese zone on 

 Trinity bay occurs at Smith Point (Fig. i) as two massive beds 

 associated with red and green nodular shales and limestones of 

 lower Cambrian age. The accompanying map (Fig. 43), prepared 

 from a transit survey of the shore Hne by Prof. van. Ingen during 

 the summer of 191 3, shows the structural and stratigraphic relations 

 of the two manganese beds, 230 D 20 and D 27. The general strike 

 of these beds is north and the dip, 20 west. 



230 D 27, the important manganese bed of this section (Figs. 44, 

 45), measures some 38 inches in thickness, and is faulted with a 

 downthrow of 15 feet on the west side. It is the thicker of the two 

 manganese beds, and has been found by analysis to be essentially a 



