248 THE PICTOU COAL FIELD — POOLE. 



down by Sir W. E. Logan in liis report. Its course is clear 

 at the northwest corner of the Vale area, and is marked by 

 the colour of the soil where the pent road from the Vale to 

 Pine Tree passes. Exposures near the house of D. McPherson, 

 where the older rocks dipping at a high angle to the S. S. E 

 have become denuded on the hill side, place it somewhat more 

 to the south than before, and it would thus appear that the 

 evidence produced to Logan of coal measures existing near the 

 house of W. Love was insufficient. 



It is not to be understood that the faults here enumerated are 

 all that are known to disturb the field, or that they are rela- 

 tively the most important. Mention is made of some of them 

 merely because they are referred to in the report of 1869 and 

 the direction and influence then given them it is here proposed 

 should be modified. It is evident there are other displacements 

 of great magnitude especially along the northern margin of the 

 basin, besides others of little or no stratigraphical moment. The 

 endeavour here has been not to describe all the faults but only 

 to make mention of those that are known to mark the flexures 

 and boundaries of the coal field. 



The Ages 



of the several rock formations found in Pictou County within 

 the restricted linuts of this paper will be briefly referred to in 

 their chronological order with the esception of the productive 

 Coal Measures, which although older than the Permian beds will 

 be left to the last. First, however, reference will be made to 

 the rocks which are 



Intrusive. — The proximity to the coal field of an extinct 

 centre of volcanic activity has not before been specially noticed, 

 but there is evidence in the surrounding older rocks of erup- 

 tions having taken place at difl'ei'ent pakieozoic periods prior to 

 the Coal Measures, and even subsequently in the Triassic epoch 

 at no great distance to the westward, on both sides of the Cobe- 

 quid hills. 



Some of the higher points and more isolated peaks of the 

 ranges of Weaver's and McLellan's mountains are igneous. There 



