MineArchive
Menu

Porcellanite

A very hard, fine-grained rock formed where heat from intrusive igneous rock baked clay-rich material; in Antrim, the Interbasaltic laterite baked by dolerite plugs, prized in the Neolithic for polished axes.

Mines

Show these mines on the map

MineRegionWorked
Brockley Porcellanite Quarry County Antrim c. 3800 BC–c. 2500 BC
Tievebulliagh Axe Factory County Antrim c. 3800 BC–c. 2500 BC

Accessibility options

Saved in this browser and applied on every page. Colour is never the only cue on MineArchive; if links are hard to pick out, underline them or raise the contrast. For larger text, use your browser's zoom.

Contrast
Link visibility
Motion
Reading width