No granite is fine, limestone and shale explode though - but they still used limestone in fulachts… they had to. That’s why fulacht mounds in Clare, for example, are large - all that shattered stone - ThreadSky

experimentarchaeol.bsky.social • 9 days ago

No granite is fine, limestone and shale explode though - but they still used limestone in fulachts… they had to. That’s why fulacht mounds in Clare, for example, are large - all that shattered stone