93 I) 



their volcanos, to make them produce such diversified 

 effects. ^,ri .,i 



From Dunhice to Seaport, the facade (here the base of 

 the arrangement) is composed of strata of tabular basalt; , 

 upon which are accumulated, up to the summit of Dun- i 

 mull, columnar strata, mixed Avith others, of the variety ; 

 called irregular prismatic. ,J hau< 



East from Carrickarede, the base of the facade is white 

 limestone: upon which, as long as it continues perpen- 

 dicular, we find ochreous and columnar strata alternating ; 

 while the hill of Knocksoghy, above, is an uniform alter- 

 nation of columnar and irregular prismatic. , 



The strata, forming the promontory of Bengore, are 

 more irregularly mixed: six of tabular basalt, five colum- . 

 nar, of fom- different varieties, three ochreous, and two ir- 

 regular prismatic, sixteen in all; of which, after the ta- 

 bular, that forms the base, no two of the same kind, are 

 contiguous to each other. 



_The yolcanist will see, that he must find a distinct vol- 

 cano for every separate little system, surrounding our 

 area; and that he must make the same crater emit dif- 

 ferent varieties of lava, and frequently by alternation. 



Fourthly. An examination of our . basalt strata, taken 

 separately, and so compared with distinct currents of lava, 

 will, I apprehend, turn out as little favourable to their 

 volcanic origin, as the comparison of their masses appear 

 to do. 



VOL. X. X Whoever 



