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Additional recommended knowledge
At Tievebulliagh, Northern Ireland porcellanite is a tough contact metamorphosed hornfels formed from a lateritic soil horizon within a basaltic intrusive/extrusive sequence. It is the site of a Neolithic axe or stone tool quarry.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Porcellanite". A list of authors is available in Wikipedia.|