The Glamorgan-Gwent Archaeological
Trust Historic Environment Record
following information has been provided under the terms and conditions
of access as detailed on GGAT’s website www.ggat.org.uk.
Copyright is reserved on all data supplied by the GGAT HER Charitable Trust.
All output resulting from the use of the data must acknowledge the source
from information held by the GGAT HER Charitable Trust copyright.
data below is intended to be used for information and research only and
is not for use as part of a commercial project. If you wish to use
information derived from material held by the GGAT HER Charitable Trust
for publication in printed or multimedia form or to compile resources for
commercial use, prior permission must be obtained in writing. For further
information or to arrange a visit to the Trust please send an enquiry form
CEFN MORFYDD DYKE
Primary Reference Number (PRN) : 02790.0w Trust : Glamorgan Gwent Community : Tonna Unitary authority : Neath Port Talbot NGR : SS7868198180 Site Type (preferred type first) : Early Medieval Dyke Status : Scheduled Monument
Summary : Cefn Morfydd cross ridge dyke maybe from the early-medieval period. It s well preserved apart from a few recents gaps. It is a bank and a ditch that curve gently in a north facing arch adhering to the 270m OD contour and is divided into three sections.
Description : Cefn Morfydd cross ridge dyke is also known as the Tona Cross Dyke and is thought to belong to the early-medieval period. Located at the northern end of Mynydd Cefn Morfydd, the dyke is positioned roughly east/west on a saddle between the mountain to the south and the Gwenffrwd ridge to the north. The dyke is well preserved apart from a few recents gaps. It is a bank and a ditch that curve gently in a north facing arch adhering to the 270m OD contour. The east end has been damaged by an industrial tramway connecting the mines at Glyncorrwg with the docks at Briton Ferry (SAM GM 447). The dyke's western end terminates near a partially destroyed earthwork enclosure, which is thought to be contemporary, although similarities in form with prehistoric domestic enclosures could also date this monument to the Iron Age. The earthwork dyke is divided into three sections creating a continuous length from the west to a large central gap with a modern farm track through it and two smaller gaps to the east. The earthwork bank takes advantages of a natural scarp standing from 1m to 2.5m in height ; a shallow ditch is positioned to the north of the bank visible as a slight depression and in several places a ditch is suggested on the south side of the bank by smaller but similar depression (RCAHM 1976 ; R. LEWIS 2006).