6 
THE GEOLOGIST. 
headlands ; tlio low pi-oraontary 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 true 
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 Oauseway-heacUands in the 
distance. In-egularly 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 Causeway 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 Chimney-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 groiip of columns called " The Organ," part of 
which is shown at the extreme right of the view (fig. 4) ; the 
distance between the " Chimney" -head and PoiinoflPer-point is only 
two hundred and fifty yards. 
