of D err y and Antrim. Ill 



Eighth Stratum, (c) . 



The next stratum is of the same variety of basalt with the 

 third, that is, irregular prismatic; it is fifty-four feet thick, 

 and in the views distinguished by the letter (c) : where it 

 emerges at the south-east corner of Portmoon, it is quite ac- 

 cessible by land, and affords the best opportunity I know for 

 examining this species of basalt, as it is there very neat. 



There is little more of this stratum seen in the facade of 

 Portmoon for want of perpendicularity, but it forms the 

 lower frustum of the great conical island Beany n Daana % 

 and the whole of the smaller, except the base ; it is well dis- 

 played over the remainder of the precipice, it forms the in- 

 termediate stratum between the magnificent colonnades at 

 both Ban gore and Pleskin, and finally is lost just over the 

 Giant's Causeway. Large globular fragments have fallen 

 from it, and are scattered about the causeway. 



Ninth Stratum, (b). 



This stratum is forty-four feet thick, that being the exac£ 

 length of the neat pillars composing it ; at its emersion it 

 forms the bases of the two conical islands in Portmoon, and 

 is no more seen in that bay, but immediately to the north- 

 ward it begins to show itself in colonnades and groups, some 

 of them resembling castles and towers. 



It ascends along the precipice obliquely, like those above 

 it, forms the lower range at Bengore and Pleskin, from 

 which last it dips to the westward regularly, composes the 

 group at Port Naffer, called the Organs, seen from the 

 causeway, and finally at its immersion, or intersection with 

 the plane of the sea, it forms the beautiful assemblage of 

 neat pillars, so long distinguished by the name of the Giant' i 

 Causeway. 



At these two intersections, each of them accessible by 

 land and water, the prisms exactly resemble each other in 

 grain, size, and neatness ; the interval between them is full 

 two miles, through great part of which this stratum is dig- 

 played at different heights; it culminates between Pit- 

 and Bengore, with its lower edge more than two hundred 

 feet above the water. 



a We 



