HOKETMAK — OK THE LOKDO^JDEliKY lilOK MINES. IIT 



the limestones used in the manufacture of iron, occurring about 

 three miles west of the mines. I was informed by Mr. Jones 

 that these limestones succeed the devonian slates without the 

 intervention of the conglomerate. This lower carboniferous 

 conglomerate of our section now occupies an elevated position, 

 more so indeed than the 3 members of the devonian series and 

 a part of the sandstones resting" on these conglomerates dips in 

 the same general direction as the older rocks. I consider that 

 the upheaval of these lower carboniferous strata and the nieta- 

 morphorsis of the sihuian and devonian formations were simul- 

 taneous, and that both were caused with similar operations at 

 Poison's Lake. Vide Geology of AntigomsJi. The upheaving 

 and altering agency appears to have been the trap which I have 

 already referred to as in connection with the silurian strata of 

 our section. To this period and agency I may therefore ascribe 

 the metamorphic and igneous phenomena of the iron beds to 

 which I have already alluded, and to the disturbing influence of 

 the trap eruption I would attribute the great slip by which the 

 rocks and iron beds at Martin brook have been divided. 

 Succeeding these silurian, devonian and lower carboniferous 

 strata, we have a broad band of carboniferous strata in the 

 opposite direction, or synclinal to those already described. Suc- 

 ceeding these again we have another broad band of strata of 

 triassic age, dipping in a direction opposite to those immediately 

 preceding, the anticlinal axis being situate between the two 

 formations. This triassic series is composed of a coarse conglom- 

 erate of considerable thickness, with interstratitied sandstone 

 which had been formed of and deposited on the carboniferous sand- 

 stone on the shores of the triassic sea. These again are succeeded 

 by coarse red sandstone of the same period. This conglomerate 

 and its sandstone now rise, with the strata immediately beneath, 

 to a considerable elevation, and dip with a high angle in the 

 same proportion as do the carboniferous strata of which they 

 form the anticline. I have not been able to ascertain the nature 

 of the elevating cause. There can be little doubt that it is trap, 

 apparent or concealed, such as is to be met with at Two Islands, 

 Five Islands, &c. 



The new line of railway being constructed between Truro 



