CYNGOR CEFN GWLAD CYMRU
COUNTRYSIDE COUNCIL FOR WALES SITE OF SPECIAL SCIENTIFIC INTEREST CITATION
NEATH PORT TALBOT
CWM GWRELYCH AND NANT
LLYN FACH STREAMS
Date of Notification:
1972, 1988
National Grid Reference:
SN 891064 to SN 906039
O.S. Maps:
1:50,000 Sheet number: 160, 170
1:25,000 Sheet number: SN 80, SN 90
Site Area:
35.3 ha
Description:
The best sequence of Westphalian (Carboniferous) rocks in the South Wales Coalfield. About
500 metres of strata are exposed, representing a more or less complete section through the
Westphalian A, Westphalian B and lower Westphalian C. Thicker sequences have been
shown in boreholes near Swansea, but this is the thickest sequence available in natural
exposures. All of the principal marine bands are visible (except the Amman Marine Band),
and there are numerous fossil bands yielding non-marine bivalves and plants. Such a
complete and well exposed section through rocks of this age is unique in Europe, and will
probably be selected as the standard reference section for the lower half of the Westphalian.
A site of outstanding international significance.