156 
occurs opposite Great Island on the Kilkenny side of the Nore. It 
rises abruptly to the height of 100 feet, and from its white colour, 
due to the decomposition of the felspar, is called the White Horse. 
A considerable mass of trap is also at the Orphan School House ; and 
other masses at Cheek Point in the bend of the Haven to the south- 
ward, and at Newtown on the western shore of the Haven. 
5. Alluvium. Modern accumulations occur in Dollar Bay; Ald- 
ridge Bay ; to the north of Bluff Head, where a layer of slate shingle 
is converted into a coarse conglomerate by carbonate of lime; be- 
tween Bluff Head and Duncannon, constituting the Duncannon 
sands, and extending inland up a small valley, in which is a peat 
bed; the narrow valley at King’s Bay or Arthurstown ; to the south 
of Dunbrody Abbey; and in Woodstown valley, on the west side of 
the Haven. Major Austin states, that greenstone boulders occur in 
all parts of Wexford, but that no rock im situ of character similar to 
them is to be found in the county. 
