Abstract

SINCE the publication of Prof. G. A. J. Cole's letter in NATURE (vol. xlvii. p. 464), in which he records the discovery of pebbles of the Ailsa Craig Riebeckite-eurite from the drift gravels on Killiney strand, numerous observers have noted its occurrence in several places along the east coast of Ireland, but hitherto, I believe, not further south than Greystones, Co. Wicklow. Owing to the special interest of this rock, both to glacial observers and petrographers, it may be worth mentioning that two weeks ago I found one small pebble (about 3 c.m. square) of the rock on the shore of Tramore Bay, Co. Water-ford, nearly 80 miles further south than the previously mentioned locality, and 230 miles from Ailsa Craig.

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