This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Petrosphere. en April This petrosphere was found at Jock's Thorn Fram near Kilmaurs in Ayrshire They are well known from northern Scotland however this is the only one from Ayrshire en Dmitri Lytov CommonsHelper Rosser en PDold Original upload log page en Petrosphere Rosser bytes no petrosphere was found at Jock's Thorn