Category: Geology

A heat-affected chunk of red sandstone found in Structure Ten. This was located beside the 'painted' orthostat mentioned yesterday and may have been used to create the red pigment. (Sigurd Towrie)

Video – ‘Why Rocks?’

Orkney International Science Festival talk by Dr Martha Johnson, highlighting the Ness of Brodgar rocks that don’t fit the local geology, and showing clues to their origins. Read more