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?’

  Today’s 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

Geology matters 3 – working stone

By Dr Martha Johnson Certain rocks have always been collected on archaeological sites – stone tools and implements that are classified as “Worked Stone”. They are meticulously assessed for aspects… Read more

Geology matters 2 – Orkney rocks!

By Dr Martha Johnson The majority of Orkney’s rocks are sedimentary, specifically clastic sedimentary rocks.  These are formed from the compression of particles –  clasts – of eroded rock materials.… Read more
Ness of Brodgar Polished Stone Artefacts

Geology matters 1 – why rock?

By Dr Martha Johnson Archaeology concerns itself with the study of past people and cultures. It involves the examination of the physical remains of these cultures – their materials, objects… Read more