74 THE UPPER SILURIAN. 



part more slaty, greenish-gray, calcareous, or 



black and fissile, . . . about GOO feet 



Division 4. Ash-gray and greenish-gray schistose beds, 

 generally chloritic and calcareous, sometimes 

 amygdaloidal and dioritic, . . about 300 ,, 



Division 5. Alternations of gray and dark-gray 

 felsites (often porphyrinic), with com- 

 pact dark-gray feldspathic rock, clouded 

 with green and purple, and with beds 

 of dark and pale-green chloritic schist. 

 There is a mass of felsite about 1 50 

 feet thick near the base, and a breccia 

 conglomerate at the summit, . about 800 feet or more. 



These rocks, with the same general structure, are widely distri- 

 buted in Southern New Brunswick, but, as might be expected, they 

 vary in detail, more especially in the upper members. They also 

 present a general resemblance to the belt of Upper Silurian rocks 

 already referred to as extending towards Bathurst, and rocks of this 

 type are known to occur in the Upper Silurian districts of Nova 

 Scotia. 



The fossils found in the lower members of this series near East- 

 port are a Lingula allied to L. centrilineata of the Lower Helder- 

 berg, and also very near to some Hamilton species, and to that found 

 in the Tower Devonian of Gaspe, though probably different from that 

 occurring in the Upper Silurian of Wentworth, Pictou, and Arisaig. 

 There are also species of Modiomorpha, and a species of Loxonema, 

 with a small Beyrichia of Upper Silurian type. Elsewhere in New 

 Brunswick these beds have afforded species of Slrophomena, Ortliis, 

 Rhynchonella, Pterinea, and corals of Upper Silurian genera. There 

 can thus be no doubt as to their general age, though we have not 

 sufficient evidence to assign them to any particular horizon in the 

 series of Upper Silurian beds known in Nova Scotia. 



The Kingston group, referred in Acadian Geology to the Upper 

 Silurian, is now regarded as in great part of older date, though 

 fossils apparently Upper Silurian have been found in some of its 

 beds. From the sections given by Bailey and Matthew, and the 

 specimens I have seen, it is apparent that its rocks somewhat 

 resemble in mineral character those of the Mascarene series. 

 They, however, also closely resemble the series of beds which, in 

 the Cobequid Mountains and East River of Pictou, is seen to emerge 

 from beneath the Upper Silurian series, and which is probably 



