Today's #StonesAtHome is a tiny curling stone made of arfvedsonite-aegirine microgranite from Alisa Craig in the Firth of Clyde. All curling stones used in international matches are quarried from this curious peralkaline intrusion. pic.twitter.com/kqfgWKXYvD
— Bob Gooday (@BobGooday) March 31, 2020
via Twitter https://twitter.com/BobGooday
March 31, 2020 at 08:55PM
No comments:
Post a Comment