Notification 1988 | Grid reference SN424084 | |
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Area 2.4 hectares (0.02400 km; 0.009266 sq mi) | ||
Cwm Twrch is a Site of Special Scientific Interest (SSSI) in Carmarthenshire, Wales.
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).
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, and which marks the Westphalian A – Westphalian B boundary in this Carboniferous rock strata.
References
Cwm Twrch Wikipedia(Text) CC BY-SA