154 
JOURNAL OF THE GEOLOGICAL SOCIETY OF DUBLIN. 
Wexford. 
Kilkenny. 
Carnarvon. 
Feet. 
Feet. 
Feet. 
5. Upper Division. 
4. Shaly, fosslliferous 
Alternating limestone 
nodular limestone,. . 
330 
and black shale, 
thinly bedded, . . . 
981 
5. Upper dolomite and 
3. Pink crystalline lime¬ 
cherty limestone, . . 
250 
stone, with hands *of 
chert,. 
526 
6. Middle Limestone, 
4. Red conglomerate 
Black marble,. . . . . 
820 
and associated coarse 
limestones and sand¬ 
7. Upper Limestone. 
Thick-bedded, mas¬ 
sive, crystalline, gray 
stones, .. 
450 
limestones, ... 
1500 
5. Red shales and marl 
beds of the coal-mea- 
sures,. 
160 
Total, ..... 
8749 
Total, ..... 
4200 
Total, ..... 
1730 
The Society met on the 9th of April, 1856, on which occasion the 
following Paper was read. 
THE IGNEOUS ROCKS OF THE BEREHAYEN DISTRICT. BY G. H. KINAHAN, 
ESQ., GEOLOGICAL SURVEY OF IRELAND. 
These Rocks occur in three different geological formations, viz.. 
Old Red Sandstone, Yellow Sandstone, and the Carboniferous Slate. 
In the Old Red Sandstone, where they are principally in the large 
mass of purple and green slates and shales which are situated near 
the junction with the Yellow Sandstone, they are all greenstones, 
with one or two exceptions. They appear in two distinct districts, 
to the north and south of the Allihies Mines. I shall begin by 
making a few remarks on the northern district. 
THE NORTHERN DISTRICT. 
The principal part of the northern trap district is situated to the 
north-west of the Mines, and south-east of Cod Head, as the promon¬ 
tory to the north of Ballydonegan Bay is called, and stretches all along 
the north-west coast of Dursey Island out to Dursey Head. The 
igneous rocks here seem to be divisible into contemporaneous and 
