No. 8.] VENNOR — GALENA IN LAURENTIAN ROCKS. 459 



Beyond the Salmon River, in an eastward direction, this line 

 of dislocation was not clearly made out, but an extension of it, 

 in all probability, was observed to afifect the strata in the 

 northern part of the township of Loughboro', where it is again 

 accompanied by galena lodes. The total distance from Methuen 

 to Loughboro' is about 60 miles. 



Besides galena and copper pyrites, gold, silver and mispickel 

 occur in the veins accompanying this dislocation. In Madoc 

 and Elzevir both the once celebrated Richardson Mine and the 

 Barrie Mine are in close proximity to it, and it is probable that 

 the great segregated masses of auriferous mispickel to the west 

 of the " Huckleberry Rocks " in Marmora are due to the same 

 agency. This point, however, requires more detailed investiga- 

 tion. There is little doubt existing in my own mind, that many 

 of the auriferous lodes of Madoc and Marmora are due to the 

 faults, and particularly so where these traverse the dolomites, 

 slates and schists of the Hastings series of rocks. The age, there- 

 fore, of these gold deposits is probably the same as that of the 

 galena lodes, namely, as recent, at any rate, as the Calciferous. 

 The source, however, from which the precious metals have been 

 derived cannot yet be satisfactorily determined. I should also 

 notice, in this connection, the occurrence at the Richardson Mine, 

 Madoc, of a black carbonaceous matter or bituminous substance. 

 This was first discovered by Dr. J. Perrigo and myself, during 

 the year 1866, and was subsequently described by Dr. Hunt, in 

 one of his Reports, as Anthracite. This substance is un- 

 doubtedly a true part of the lode, and was deposited along with 

 the gold ; it is, however, oi' rare occurrence. Respecting the 

 depth to which these lodes are ore-bearing, little can be said 

 with certainty at present, as there are no shafts or openings 

 deeper than 100 or I'Ab feet on any of them, by which this point 

 mieht in a measure be tested ; but from what evidence I have 

 been enabled to gather, I agree with Sir W. E. Logan, in a state- 

 ment made by him respecting the Ramsay Galena lode, that 

 "whatever quantity of ore the lode may carry with it, there is 

 little doubt of its great depth, a depth to which indeed no cer- 

 tain limit can be placed." This statement equally applies to 

 most of the galena lodes examined by me in Frontenac, Hastings 

 and Peterboro' Counties. As to the quantity and constancy of 

 the mineral in these, a word or two may be said. So far, we 

 have abundance of proof that the galena does not extend far 



