| Site of Special Scientific Interest | |
  Location within Carmarthenshire | |
| Location | Carmarthenshire |
|---|---|
| Grid reference | SN423276 |
| Coordinates | 51°55′27″N4°17′42″W / 51.92406°N 4.29494°W |
| Area | 39.4 hectares (0.3940 km2; 0.1521 sq mi) |
| Notification | 12 February 2010 |
Rhosydd Llanpumsaint is a Site of Special Scientific Interest (SSSI) in Carmarthenshire, Wales. [1] [2]
Rhosydd Llanpumsaint SSSI is located approximately 1.33 miles (2.14 km) west-south-west of Pontarsais and 1.33 miles (2.14 km) north-west of Rhydargaeau. The site covers 39.4 hectares (97 acres). [1] [2]
The Rhosydd Llanpumsaint site is notable for geomorphological features which in turn support special biological features. The site - field and peatland - has on its west side numerous oval depressions of up to 70 metres (230 ft) diameter thought to have been formed by mineral pillars under permafrost ice which have collapsed on the retreat of the ice, to leave an undulating surface the depressions of which have become sediment and peat filled. The site is one of the best examples of ramparted ground-ice depression features in Wales. The depressions, in turn, provide a mire habitat for a variety of plants such as red bog moss (Sphagnum capillifolium), hare's-tail cotton-grass (Eriophorum vaginatum), cross-leaved heath (Erica tetralix) and heather (Calluna vulgaris). The mix of plants in any depression varies according to conditions in and water supply for the depression, and the site hosts a wide and diverse set of species including the only known colony of the liverwort (Pallavicinia lyellii) in Carmarthenshire. [2]
A site of special scientific interest (SSSI) in Great Britain, or an area of special scientific interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle of Man. SSSI/ASSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in the United Kingdom are based upon them, including national nature reserves, Ramsar sites, Special Protection Areas, and Special Areas of Conservation. The acronym "SSSI" is often pronounced "triple-S I".
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Gweunydd Blaencleddau is a large wetland complex in a shallow south-west valley around the headwaters of the Eastern Cleddau river. It is a Site of Special Scientific Interest (SSSI) and a Special Area of Conservation (SAC) situated in Pembrokeshire, South Wales.
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Smarts Quarry is a Site of Special Scientific Interest (SSSI) in Carmarthenshire, Wales, designated in 1987 for its geological features.
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