6 



THE GEOLOGIST. 



headlands ; tlie low promontary in the foreground is formed entirely 

 of bedded basalt apparently of different degrees of hardness, and 

 is exceedingly interesting, as affording an insight into the trae 

 manner in which basaltic flows of unequal compactness are de- 

 posited, a single bed of harder basalt being observed to branch 



Lign. 3.— View looking east from a window in Dunluce Castle, the Causeway-headlands in the 

 distance. Irregularly deposited Basalt. 



off SO as to form two beds, each equal in thickness to the first; 

 while in another part of the cliff two beds join into one bed, 

 which then equals their united bulk. These are facts that we must 

 bear in mind when examining and describing the Cause^vay and the 

 adjoining cliffs. 



To the spectator who stands on that bed of columnar basalt called 

 " The Giant's Causeway" the view presented on the north-east, across 

 Portnoffer Bay, embraces the profile of the Cliinmey-headland, half 

 a mile distant and three hundred and eighty feet in elevation, as 

 well as that of the nearer and less lofty projection of the coast east 

 of Portnoffer, three hundred and twenty-seven feet above the sea. 

 Adjoining this is the group of columns called " The Organ," part of 

 which is shown at the extreme right of the view (fig. 4) ; the 

 distance between the Cliinmey"-liead and Portnoffer-point is only 

 two hundred and fifty yards. 



