Mapping the Island’s Archaeology
Work conducted by CHERISH has built upon the important work conducted by Gwynedd Archaeological Trust in their 2014-15 management plan by using ALS and UAV survey to map all visible archaeological monuments on the island in order to improve and expand upon the existing monument records for the island. Historical aerial photography has also been used to compliment these techniques by providing information on archaeological cropmarks.
The eroding section at Henllwyn has also been hand drawn to accurately record eroding archaeological features. This work is important as previous geophysical surveys show this part of the island to contain a density of buried archaeological remains that could relate to a prehistoric cemetery. Several fragments of animal bone have also been extracted from the section. These have been radiocarbon dated to 778-916 AD, possibly related to early farming on the island.