Llandeilo

Coordinates: 51°53′06″N 3°59′31″W / 51.885°N 3.992°W / 51.885; -3.992

Llandeilo is a community and town in Carmarthenshire, Wales, situated at the crossing of the River Towy by the A483 on a 19th-century stone bridge. Its population was 1,795 at the 2011 Census. It is adjacent to the westernmost point of the Brecon Beacons National Park.

The town is served by Llandeilo railway station on the Heart of Wales Line.

Early history

Llandeilo is named after one of the better-known Celtic saints of the 6th century, Saint Teilo. The Welsh word llan signified a monastery or a church. Saint Teilo, who was a contemporary of Saint David the patron Saint of Wales, established a small monastic settlement (clas) on the site of the present-day parish church.

Although there is very little factual detail about the life of Saint Teilo, it appears that he was highly respected in his lifetime, and revered after his death: there are 45 places dedicated to him, some as far afield as Brittany.

After Saint Teilo's death, two equally important ecclesiastical centres in Wales, Llandaff and St David's, laid claim to his body. There is reasonable evidence to suggest, however, that Saint Teilo was buried in Llandeilo, where "he spent a solitary life gloriously". The parish church of Llandeilo Fawr (Great Llandeilo) is dedicated to Saint Teilo, and until 1880 its churchyard encompassed his baptistry.

Llandeilo Group

In geology, the Llandeilo Group is the middle subdivision of the British Ordovician rocks. It was first described and named by Sir Roderick Murchison from the neighborhood of Llandeilo in Carmarthenshire. In the type area it consists of a series of slaty rocks, shales, calcareous flagstones and sandstones; the calcareous middle portion is sometimes termed the Llandeilo limestone; and in the upper portion volcanic rocks are intercalated.

Features

A remarkable feature in the history of the Llandeilo rocks in Britain, more especially in North Wales and Cumberland, was the outbreak of volcanic action; vast piles of Llandeilo lava and ashes form such hills as Cadair Idris, and the Arenigs in Wales, and Helvellyn and Scafell in Westmorland and Cumberland. The series is also found at Builth and in Pembrokeshire. The average thickness in Wales is about 2000 ft. The group is usually divided in this area into three sub-divisions. In the Corndon district of Shropshire the Middleton Series represents the Llandeilo group; it includes, in descending order, the Rorrington black shales, the Meadowtown limestones and flags, and the western grits and shales. In the Lake District the great volcanic series of Borrowdale, green slates and porphyries, 8000 to ooooft. in thickness, lies on this horizon; and in the Cross Fell area the Milburn beds of the Skiddaw slates (see Arenig) appear to be of the same age. In Scotland the Llandeilo group is represented by the Glenkiln shales, black shales and yellowish mudstones with radiolarian cherts and volcanic tuffs; by the Barr Series, including the Benan conglomerates, Stinchar limestone and Kirkland sandstones; and by the Glenapp conglomerates and Tappinsrnudstones and grits south of Stinchar. Graptolitic shales, similar to those of southern Scotland, are traceable into the north-east of Ireland.