The origins of the Stonehenge bluestones will headline an Archaeology Day tomorrow (Saturday).

The day, organised by Pembrokeshire Coast National Park Authority, will be held at the Merlin Theatre, in Pembrokeshire College, and will include five talks and question and answer sessions.

Guest lecturer Professor Mike Parker-Pearson of University College London will lead a talk about his research into how bluestones from the Preseli Hills became construction material for Stonehenge 5,000 years ago.

In addition Louise Barker and Toby Driver, of the Royal Commission on the Ancient and Historical Monuments of Wales, will share their discoveries on Skomer Island, while Roger Thomas will delve into the 19th century fortification of Pembrokeshire.

Tickets are £12, and include a light lunch and morning and afternoon coffee. Visit wwworielyparc.co.uk or call 01437 720392. To hold a display call 01834 862105.