O70 Scientific Proceedings, Royal Dublin Society. 
equal distance north of the same village. In the first-named locality 
the rock may be obtained in a practically unsheared condition, but 
at Ballymooney, where it occurs in greater quantity, it is every- 
where highly sheared. The direction of shearing in both cases is 
approximately parallel to the axis of the granite mass, 7.e. north- 
east and south-west, but a reference to the map below will explain 
how it is that the shearing has been apparently more intense in the 
northern than in the southern locality. At Deerpark a tongue of 
: [\ 
Schistase \\andesite |} Xx 
a 
icra 
O 
Uopan x x 
Va GRANITE x x 
chistose J% x x x Mere OG x 
andesite 
granite runs out from the main mass in a north-west direction, that 
is, across the general strike of the Ordovician slates, and at right an- 
gles also to the direction of shearing. On the ground this granite 
tongue forms a prominent rounded saddle-ridge, on the lower slopes 
of which occurs the porphyritic rock referred to. It is clear that, on 
the assumption that this granite mass resisted the shearing, a rock 
lying in such a position would be more protected from shearing 
effects than'one occurring in an exposed position, as is the case 
