DU NOYEB— NOTES ON THE GIANT's CAUSEWAY. 
scquently in them wc liixve regained the same geological horizon or 
the beds equivalent to those forming the hu^o of the Chimney- 
headland. 
From the foregoing , 
remai-ks wo may infer 
1st, That lava-flows 
arc much less regular 
and parallel to each 
other in theii* deposition 
than matter deposited to 
form an aqueous rock. 
2nd, The Basalt wliich 
forms the colimmar bed 
known as the " Giant's 
Causeway" is quite a 
local deposit, measurmg 
at the most two thou- 
sand six hundred feet in 
width, or from east to 
west, and appearing 
along the coast as a len- 
ticular shaped bed, thin- 
ning out at either side ; 
and it occupies a flat- 
tened trough in the 
amorphous basalts wliich 
underlie the great ochre- 
bed of the " Chimney-" 
headland. 
3rd, The section af- 
forded by the coast ad- 
jouiing the Causeway is 3 4. 
a cutting transverse to Lign. g.-Grouping of Basaltic columns. 
. Figs. 1 and 2. — Three sided columns smroimded by their 
the longest axis of, at associated piUars. Fig. 3.— The largest perfect column at 
the Causeway ; a nonagon smTounded by its adjoining 
least, this lava-flow. pillars. Fig. 4. — Possibly a decagon colunm, surroimded 
by nine other columns. It may, however, be merely a hex- 
■ith The columns of fgon, and a heptagon attached by one side longer than the 
' others— no means of proving whether the central dirision 
tllis particular bed ap- prolonged below the articulation of the pillar shown in 
^ ^ the view. 
