1914-] CONCEPTION AND TRINITY BAYS, NEWFOUNDLAND. 431 



and other organic bodies. 

 with chlorite fringing it. 

 bite fragments. 



Barite is found infrequently, sometimes 

 Chlorite may be found replacing trilo- 



FiG. 47. Micropliotograph of fossiliferous manganese ore, 230 D27 ; slide 

 299 ; from Broad Cove ; enlarged 22 diam. a, manganese carbonate-oxide 

 ore; b, fragment of trilobite test. 



The following analysis and recalculation represent the chemical 

 composition of an average sample of the bed and will corroborate 

 some of the petrographic observations : 



Analysis K. 

 230 D 27. 



SiO, 



Fe^Os 



ALO3 



MnO 



CaO 



MgO 



P2O5 



H,0 



15-14 



9.22 



12.04 



25-63 



10.04 



3-72 



1.26 



2-73 



CO, 21.05 



Analysis K i. 

 Recalculation. 



MnCOa 26.91 



MnO, 9.00 



CaCOa 15.21 



MgCOa 7-75 



Fe^Os 9.22 



Ca3(P0,), 2.50 



SiO, 84 



2H30AL03-2SiO, 30.06 



101.49 



100.83 



PROG. AMER. PHIL. SOC, LIV. 220 DD, PRINTED FEBRUARY 23, I916. 



