274 
Mr. Weaver on the 
range from Pallis hill, of which last hill it forms the eastern and 
north-eastern base. 
In Knock Dirk the rock is exposed in many places, and on the 
south-western side near the summit it is evidently composed of 
strata from one to three feet thick, dipping at an angle of 36° toward 
the west ; but low down on this side it presents no distinct stratifi- 
cation^ The same observation may be applied to the exposed rocky 
parts of Knock Rua, which in the upper portions appear disposed in 
strata from six inches to two and three feet thick, dipping 65° to- 
ward the west, while in the deeper the rock is more solid, massy, 
and less divided. But in proceeding westward, the stratified rock 
opens like a fan, the strata gradually acquiring an opposite inclina- 
tion toward the east. In Kilteely, tfie strata are from one to three 
feet thick, dipping 70° toward the west. The composition of these 
three hills is very similar, consisting mostly of varieties of felspar 
porphyry ; but in the lower grounds, on the north-western side of 
Kilteely, the rock approaches to basalt and greenstone, yet is still 
porphyritic. 
§ 176. The structure of Pallis hill is more complex and inte- 
resting. The base on the east, as already observed, appears to be 
limestone. The superincumbent beds present a rudely terraced out- 
line, the higher receding from the lower, while in their aggregate 
they constitute a mass of a horse- shoe form, whose concavity is 
turned toward the west. And in following these beds around the 
convexity of the curve, wherever their outcrops admit of observa- 
tion, we generally find them dipping toward this concavity, con- 
verging, as it were, toward a common centre. 
The predominant rock of Pallis hill is trap, of every variety that 
I have hitherto described. It is distinctly interstratified with lime- 
stone ; and from the frequent occurrence of fixed blocks of lime- 
