Cwm Twrch

For the village, see Cwmtwrch.

Cwm Twrch is a Site of Special Scientific Interest (SSSI) in Carmarthenshire, Wales.^[1][2]

Cwm Twrch

Site of Special Scientific Interest
Location within Carmarthenshire
Location	Carmarthenshire
Grid reference	SN424084
Coordinates	51.79933°N 3.80342°W / 51.79933; -3.80342
Area	2.4 hectares (0.02400 km2; 0.009266 sq mi)
Notification	1988

SSSI

Cwm Twrch SSSI is located on and around the Afon Twrch approximately 0.9 miles (1.4 km) north-east of Ystradowen, and covers 2.4 hectares (5.9 acres).^[1][2]

The site is notable for its geology, where river erosion provides the best exposes the Amman Marine Band, a sedimentary layer showing a diverse fauna, which marks the Westphalian A – Westphalian B boundary in this Carboniferous rock strata.^[2]

See also

• List of Sites of Special Scientific Interest in Carmarthenshire