I9I4.] CONCEPTION AND TRINITY BAYS, NEWFOUNDLAND. 435 



In writing of the circulation of the manganiferous solutions and the 

 conditions under which they might be precipitated in the coastal 

 shoals or lagoons, Penrose says (20: 590, 591) : 



" This gradual local accumulation of land and marine sediments would 

 eventually cause shoals and possibly coastal lagoons and swamps, into which 

 the waters from Archaean rocks of the Missouri Archipelago would drain." 



" Here the solutions exposed in a stationary condition to the oxidizing 

 and evaporating action of the atmosphere, would deposit their metalliferous 

 contents as carbonate or possibly oxide of manganese. In some places con- 

 siderable bodies of ore might be formed in one spot, in others the manga- 

 nese would be dessiminated through the mechanical sediments being laid 

 down at the same time. A secondary chemical action might cause the segre- 

 gation of the disseminated manganese and the formation of concretions of 

 carbonate of manganese, which would be later oxidized in forms such as are 

 characteristically shown at the Cason mine, near Batesville, and elsewhere in 

 the region. In other places the manganese might remain in a finely dissemi- 

 nated state, causing the common occurrence now seen throughout the region 

 of an earthy manganiferous limestone containing from 3 to 15 per cent, of 

 manganese." 



Saxony. — The writer was led to analyze certain of the man- 

 ganese minerals from Schebenholz near Elbingerode in the Harz, 

 which were purchased from Krantz, because of certain physical re- 

 semblances to the Newfoundland specimens. One specimen labelled 

 " Allagite with Dialogite, etc." consists of three different materials ; 

 the first is greenish and gave the following analysis : 



SiO, 39.10 MnSiOa 33-98 



Fe,03 1.87 MnCOs iS-05 



ALO3 10.79 MgCOs 12.64 



MnO 27.69 CaCOg 1.70 



CaO i.oo SiO, 10.97 



MgO 6.08 Fe^Os I.7S 



H,0 1. 13 2H,OAL03-2SiOo 23.76 



CO, 1313 99.85 



100.79 



Unfortunately the early descriptions of this substance were not 

 quoted very fully by later writers, but one of the imported speci- 

 mens which was similar to the one analyzed had the following 

 original label pasted on the back of it : 



