Assertion: bluestone | /r/HasProperty | igneous rock
Facets:
Source sentences:
text: It is generally accepted that the bluestones (some of which are made of dolerite, an igneous rock), were transported by the builders from the Preseli Hills, 150 miles (240 km) away in modern-day Pembrokeshire in Wales.
text: As a prehistoric stone circle, it is unique because of its artificially shaped sarsen stones (blocks of Cenozoic silcrete ), arranged in post-and-lintel formation, and because of the remote origin of its smaller bluestones ( igneous and other rocks) from 100–150 miles (160–240 km) away, in South Wales .
text: The bluestones (made of dolerite, an igneous rock), were thought for much of the 20th century to have been brought from the Preseli Hills, 160 miles (260 kilometres) away in modern-day Pembrokeshire, Wales.