Tievebulliagh (from Irish Taobh Builleach) is a 402-metre-high (1,319 ft) mountain in the Glens of Antrim, Northern Ireland.

[1] Tievebulliagh is formed from a volcanic plug, the intense heat generated by molten basalt has given rise to the formation of a durable flint, porcellanite, which is found at the foot of the eastern scree slope of the mountain.

[3] Flint axe heads fashioned from porcellanite that originate from this quarry have been found across the British Isles, from the Outer Hebrides to the south coast of England and across the rest of Ireland.

Flakes, rejects and part-finished axes have been found round the hill and peak.

They were then exported as far afield as south-west Ireland, south-east England and north-east Scotland.