Geological Survey of Canada, 83 



"flesh-red feldspar. In the feldspatkic dyke, small narrow veins of 

 specular iron ore occur, which appear to run either parallel with the 

 -dyke or slightly oblique to it, and the quartz vein and its subordinate 

 droppers cut across both. Were this vein as conveniently situated as 

 those of somewhat similar character on Lake Huron, it is fully as well 

 worthy of trial as many that were selected by explorers there, some 

 years ago, upon which to found claims for mining locations." 



Mr. Richardson was fortunate in having as his field for explo- 

 ration (he remarkable, and interesting island of Anticosti, which 

 he f.pund to consist of limestones representing the middle forma- 

 tions of the Silurian period, and dipping to the southward, giving 

 a high and bold outline by their outcropping edges to the north 

 coast, while at the south they dip gently, with a low shore, under 

 the waters of the Gulf of St, Lawrence. These rocks are arranged 

 by Mr. Richardson in six divisions, of which the following mav 

 serve as a general summary in ascending order : 



ft. in. 

 (A) Grey limestone and argillaceous limestone, with green- 

 ish shale and conglomerate limestone, the highest bed 

 containing some very singular impressions or animal 



tracks 229 



{B) Gray, greenish -gray, and reddish-gray limestone, with 

 shale and limestone conglomerate. In one of the 

 limestones occurs a singular trunk-like fossil named 

 Beatricea by Mr. Billings, along with corals and ma- 

 rine shells 730 



(C) Argillaceous limestones, argillo-arenaceoiis shales, 



coral limestones. Beatricea, occurs in these also. .. . 306 3 



(D) Ash-gray and reddish-gray limestones, bituminous 

 limestones and shales, and measures unseen. Some of 



the limestones contain Pentamerus 480 



(E) Gray and drab argillaceous and bituminous lime- 

 stones, abounding in Pentamerus, Atrypa reticularis, 

 Calymene BlumenbocJiii, and many other mollusks 



and trilobites 550 



(F) Gray and yellowish granular limestone, with quanti- 

 ties of crinoidal remains and corals 69 



Mr. Billings, on the evidence of the fossils, refers divisions A 

 and B to the Hudson River groups, many of the most character- 

 istic fossils of which are contained in them; but the presence of 

 the genera Catenipora, F.avosites, and Ascoceras indicates an 

 approach to the Upper Silurian. Divisions C and D afford sev- 



