Preseli Mountains
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The Preseli Mountains, also known as the Preseli Hills, or just the Preselis, are a range of hills in western Wales, mostly within the Pembrokeshire Coast National Park and entirely within the county
Northern moorlands of the Preselis, near Carn Ingli, Pembrokeshire
The western Preselis viewed from the northeast
View from Carn Menyn eastwards towards Foel Drygarn (centre-left) and Y Frenni (centre-right) in the distance
Castell Henllys reconstructed Iron Age fort
Bluestone
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Bluestone is a cultural or commercial name for a number of natural dimension or building stone varieties, including:
Preseli Mountains
…that the hills were once forested but the forests had been cleared by the late Bronze Age. In 1923 the petrologist Herbert Henry Thomas proposed that bluestone from the hills corresponded to that used to build the inner circle of Stonehenge, and later geologists suggested that Carn Menyn (formerly called Carn…
Carn Menyn bluestones. These dolerite slabs, split by frost action, seem to be stacked ready for the taking, and many have been removed over the centuries for local use. Research favours the theory that humans also transported stones from Carn Menyn to build Stonehenge, about 250 km away.
Bluestone monument and Carn Menyn, Preseli Hills
HM Prison Pentridge was one of the many buildings constructed of local bluestone in Melbourne in the 19th century
Typical colouring caused by mineralisation in Adelaide bluestone