2o5 



ILLUSTRATIONS OF THE 



83. Now 



th 



of limeft 



lor the balls 

 from above. 



^r this rib 

 panied it. 



as 



ime 



4 



It 



ith 



they were found 



ty 



They 



of the place where 

 null, therefore, havp 



been forced up from below, and no doubt be 



long to fome limellone ft 



hich lie there 



great depth under the furface. The length 



of 



fragment of rock, which, from the 



ac- 



count, one muft fuppofe to have been entire 

 conveys no mean idea, either of the intenfity or 

 regularity of the force by which it was brought 

 into its prefent fituation. In veins, it is not un- 

 common to meet with ilcnes that appear to have 



from a greater d 



but th 



s 



bably 



the moil 



b 



e 



remarkable inftance of the fame pbe- 

 non, which has appeared in a mere flip, and 

 I think, can fpeak a language lefs liable to 

 funderfiood. 

 184. I fliall here mention another mark of 

 violent fradure, that has been obferved in rocks 



n 



of breccia or pudding-ftone, which, though not 

 of the fame kind with the preceding, and of a 

 nature quite peculiar, belongs rather to this 

 place than any other. In rocks of the kind, 

 juil mentioned, it fometimes happens, that con- 

 fiderable portions are feparated from one ano- 

 ther, as if by a mathematical plane, which bad 

 -€ut right acrofs all the quartzy pebbles in 



Its 



way 



