Pembrokeshire Coalfield
Encyclopedia
The Pembrokeshire Coalfield in West Wales
Wales
Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 is one of the smallest British
Great Britain
Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...

 coalfields. The main coalfield extends from Saundersfoot
Saundersfoot
Saundersfoot is a community in Pembrokeshire, west Wales. It is known as a seaside resort, and along with nearby Tenby is one of the most visited Welsh holiday destinations.-Harbour:...

 on Carmarthen Bay
Carmarthen Bay
Carmarthen Bay is an inlet of the south Wales coast. The coastline includes famous beaches, including the Pendine Sands and Cefn Sidan sands, and is partially covered by the Pembrokeshire Coast National Park....

 westwards to Broad Haven
Broad Haven
Broad Haven is a village in the south east corner of St Bride's Bay at the terminus of the B4341 in south Pembrokeshire, Wales. Broad Haven is part of the Havens division of Pembrokeshire County Council. The 2001 census records a population of 1,328 for the Havens...

 on St Brides Bay. A small detached portion of the field is centred around Newgale
Newgale, Pembrokeshire
Newgale is a village with a three mile stretch of beach in the parish of Roch, Pembrokeshire, West Wales.Newgale is one of over 40 Welsh 'Blue Flag' beaches, which means it has the top certification for quality, cleanliness and facilities....

 on St Brides Bay.

The coalfield is in effect the westernmost extension of the South Wales Coalfield
South Wales Coalfield
The South Wales Coalfield is a large region of south Wales that is rich with coal deposits, especially the South Wales Valleys.-The coalfield area:...

 though it is separated from the main body of that field by Carmarthen
Carmarthen Bay
Carmarthen Bay is an inlet of the south Wales coast. The coastline includes famous beaches, including the Pendine Sands and Cefn Sidan sands, and is partially covered by the Pembrokeshire Coast National Park....

.

Coal seams within the Pembrokeshire Coalfield are traditionally referred to as veins. The following sequence is recognised in the west of the district:

The Stonepit and Quarry Veins are collectively referred to as the Sibbernock Veins. The sequence from the Three Quarter to the Foot Vein constitutes the Newgale, Simpson and Eweston Coals.

In contrast in the centre and east of the district, there are fewer veins in what is a more compressed sequence:
  • Rock Vein
  • Timber Vein
  • Lower Level Vein
  • Kilgetty Vein
  • Tan Pits Vein
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