Dating in gwynedd
Dating in gwynedd - full eastern europian dating
This work has included gathering highly accurate (centimetre and sub-centimetre) 3D data to monitor the eroding cliff edge using techniques such as terrestrial laser scanning and UAV/drone survey.This will provide an accurate baseline for future monitoring and with analysis of historical documents such as aerial photographs and mapping, will reconstruct as accurately as possible erosion rates over the past 150 years.
Early maps and the curve of the surviving hillfort defences suggest that it was once entirely enclosed but today the majority of the western defences have been lost to the sea following years of erosion.
There is a possibility that the prominent, squarish stone mound inside the fort is the remains of a building or tower; could it be a Roman pharos or lighthouse?
Early medieval occupation of this prominent site is also very likely; Dinas Dinlle takes its name from one of the Welsh legends of the Mabinogi and the story of Math mab Mathonwy and Lleu Llaw Gyffes, who gave his name to the hillfort Dinlle ('din' in old Welsh meaning fort and 'Lle' short for Lleu).
Ongoing work by Birkbeck, University of London, with Aberystwyth University and CHERISH to date the sand spit of Morfa Dinlle north of the fort (using OSL/Luminescence dating) suggests it only dates back to Roman times.
This means that the sea – or salt marsh – may have extended from the northern foot of Dinas Dinlle (where the village is now) in the later Iron Age.
It is set on a hill of glacial drift sediments (specifically a thrust-block moraine) overlooking the sea and Caernarfonshire coastal plain.
The hillfort and Second World War seagull trench on the northern slopes of the fort are protected as Scheduled Monuments by Cadw and the hill is a Site of Special Scientific Interest (SSSI), designated for the importance of the glacial sediments, clearly seen in the exposed sections of till, sand and gravel in the cliff face.
These deposits result from ice re-advance from the Welsh ice cap towards the Irish Sea Ice Stream during deglaciation at the end of the last glaciation, known as the ‘Devensian’ period, some 12,000 years ago.
It is hoped that direct dating of these sediments using Optically Stimulated Luminescence dating (OSL) should reveal just how long ago these sediments were laid down. It is thought to be later prehistoric (Iron Age) in date but chance finds of Roman coins, an intaglio (a carved gemstone worn in a ring) and pottery suggest occupation in the Roman period.
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.