judging the cold and windy conditions, i would asume the coast line was further out in mesolithic times, it is a very exposed area.
Bank and ditch fortification
From the notice board near the site
Remaining earthworks
Remaining earthworks of the cairn.
In Nevern, off A487.
"A small area of modern Pembrokeshire, comprising the built-up area of Newport town. It lies within the medieval Cantref Cemaes. Cemaes was brought under Anglo-Norman control in c.1100 by the Fitzmartins who established their castle at Nevern on the site of an iron age fort. Cemaes remained in Angle-Norman hands until 1191 when Rhys ap Gruffudd retook it. He strengthened Nevern Castle, but Welsh supremacy was short-lived for Rhys died in 1197 and in the same year William Fitzmartin regained control of Cemaes"
The top of Nevern Castle – a larger bank can be seen ahead this is the motte of the castle – the road is the other side of this.
defensive?
(Picnic benches nearby)
large bank/hill on the left with a ditch on the right. I would assume it was for defensive purposes. A ridge is to the extreme right and just out of the photo.
Ridge which public foot-path occupies (centre) the road is on the horizon. Ditches either side of bank.
View of the public entrance near the road – public footpath goes along a steep ridge (as seen) with ditches either side.
to the extreme left and just out of the photo the topography slopes upwards again; the ditch(es) could then be interpreted as defensive.
these druids are ignorant, people are allowed their beliefs, but druidism was a idea invented by William Stukely in the 1700's
It's worth getting an OS map for this area of the Welsh country side, I did because it was part of my research for my archaeology course. It is worth owning one because there are other significant contemporary monuments in the area such as Meini Gwyr and Gors Fawr stone circles a mile or two away with other standing stones, stone cirlces, 6 ring barrows and 11 barrows aswell as Iron age features scattered in this area of the country side. Many features are scattered close to the main road from Crymmych heading south.