I9I4.] CONCEPTION AND TRINITY BAYS, NEWFOUNDLAND. 409 



wick described by W. D. Matthew (15). The chemical analyses of 

 the Maniiels brook and the New Brunswick phosphate nodules are 

 as follows : 



Analysis H. 

 Manuels Brook, N. F. Hanford Brook, N. B. 



SiO, 25.20 SiOo 24.74 



ALO3 7.67 ALO3 11.85 



Fe.Oa 10.13 Fe.Os ii.44 



CaO 23.50 CaO 22.35 



MgO 478 KO 0.59 



P.O, 17.68 MgO 2.29 



H3O 2.71 NaO 1.41 



CO2 . .^ 2.23 P,05 1499 



9390 



H,0 3-43 



3-44 



CO, 3.53 



100.06 



The similarity between the percentages of SiOo, FcoO,, CaO and 

 P2O5 of the two analyses is at once very noticeable and at the same 

 time very suggestive. It is hoped that at some future time^, work of 

 a correlative nature may be taken up in connection with these inter- 

 esting and genetically problematical nodules. Among the macro- 

 scopically observable minerals in the fresh and altered rock are 

 pyrite, hematite, limonite, wad or psilomelane, and vivianite in an 

 argillaceous dolomitic groundmass. HyoHthes fragments are in 

 abundance. - 



As no apparent manganese was observable in the considerable 

 thickness of overlying green shales, 219 A 13 was considered to be 

 the top of the manganese zone at Manuels Brook. According to 

 Prof, van Ingen the Paradoxides fauna begins in these shales which 

 immediately overlie the manganese zone. 



Topsail. — The manganese at Topsail some 4 miles east of 

 Manuels (see Figs, i and 30) occurs interbedded in steep northerly 

 dipping (50° to 78°) lower Cambrian strata consisting of shales, 

 limestones and sandstones. The manganese is found in several beds 

 of which only one measuring 1.4 feet in thickness seems to be of 

 sufificient importance to have warranted prospecting, as shown by 



