Dating in gwynedd
1026-49 (although a few also appear in earlier MSS).
These contained englynion, which alone are extant as a result of having been copied into the Red Book of Hergest, col.
The effects of intense rainfall and drought: Recent observations after periods of intense rainfall show that sub-surface water flow is pushing off the front of the cliff face in places.
Sub-surface flow could lead to mass movement events, while the southern ditches of the hillfort would appear to route some overland and sub-surface flow towards the cliff face in times of high rainfall; the ditches effectively act like gutters.
It was surveyed by the Royal Commission in 1949, and its condition then was only ‘fair’.More intense rainfall with climate change could increase this erosion, coupled with periods of more intense drought which desiccate the fragile coastal soils leading to wind erosion and the creation of cracks which allow the formation of natural soil pipes under the surface.