Cylchlythyr

Mae Ynys Gwales ac Ynys Sgomer yn ddwy ynys sy'n gyfoethog yn archaeolegol oddi ar arfordir gorllewinol penrhyn Marloes yn ne Sir Benfro. Ymhlith y miloedd o nythod huganod a thyllau palod sy'n gorchuddio’r ynysoedd mae olion strwythurau carreg dirgel, dirifedi, waliau cerrig sy’n rhyng-gysylltu, balciau wedi'u haredig a nodweddion archaeolegol eraill. Mae'r olion gweladwy’n cynrychioli pobl yn preswylio yma ac yn ffermio ar yr ynysoedd sy'n rhychwantu'r cyfnodau cynhanesyddol a chanoloesol. Mae ymchwil diweddar gan CHERISH wedi datgelu rhywfaint o ddirgelwch yr ynysoedd drwy archwilio a chofnodi eu harchaeoleg sy'n erydu.

Dywed LiDAR survey of Grassholm allowed for the precise identification and mapping of all surviving prehistoric structures and field boundaries spread across the island. Based on this work several areas of interest were identified which were investigated during a 2019 visit by CHERISH. The main priority for the team was to undertake a rapid two-day evaluation excavation of a single stone-built structure towards the centre of the island that had become exposed due to the erosion of the previously overlying vegetation. A small segment of one of the structure’s walls was excavated to characterise the way in which it was constructed and to recover any possible artefactual evidence. The small part of the structure that was uncovered was very well-built, however, a lack of dating evidence made dating the structure extremely difficult.