5S GEOLOGY OF THE CAMPSIE HILLS, 



I have here given them, as they relate to a phe- 

 nomenon, which, I think, merits some attention, 

 especially when the various changes that have 

 taken place upon the crust of our globe, are taken 

 into consideration. 



By the description here given of the general 

 stratification of the Campsie Hills district, it will 

 be perceived, that it presents nothing peculiar or 

 very remarkable among its various strata, and is 

 in a great degree similar in its formation to most 

 of the coal-fields in Scotland. I may, however, 

 perhaps be here permitted to except one dissimi- 

 larity, — which is the immense bed of trap that is 

 so generally the superincumbent stratum of this por- 

 tion of the country. From the general configura- 

 tion of this trap into columnar forms, it will be 

 deemed by some geologists to be of volcanic origin, 

 or that these forms have been produced by the ef- 

 fects of internal heat. In consequence of the writer 

 of this memoir having examined much of Mount 

 Etna from base to summit, and having been fre- 

 quently upon Vesuvius, as also having visited some 

 of the Lipari Islands, he may perhaps be allowed 

 to have gained some knowledge regarding the ap- 

 parent effects of heat upon fossil bodies ; and, as- 

 suming upon this knowledge gained by his fre- 

 quent visits to volcanic regions, he proposes to 

 venture here some opinions upon this controverted 

 subject ; and, in doing so, he must commence by 



