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Pebidian Supergroup
The Pebidian Supergroup is an Ediacaran (i.e. late Precambrian) lithostratigraphic supergroup (a sequence of rock strata) in Pembrokeshire, west Wales. The term 'Pebidian' (along with Dimetian) was coined by geologist Henry Hicks in 1876 and published in a scientific paper in the Quarterly Journal of the Geological Society in the following year. It was named for ''Pebidiauc'', an ancient local name for the St Davids area.〔Sissingh, W. 2012 ''Rocky Roads from Firenze: History of Geological Time and Change 1650-1900'' Utrecht Studies in Earth Sciences 020 Utrecht University Chapter 9 Main sequences of rocks p533 The ISBN printed in the document (978-6266-305-7) is invalid due to an incorrect number of digits. retrieved 9 Oct 2013 from http://igitur-archive.library.uu.nl/geo/2012-1003-200424/Rocky-roads-Sissingh_USES-20120814-part%20III.pdf〕
==Outcrops==
These rocks are exposed in the St David's peninsula in northwestern Pembrokeshire. One outcrop stretches east from Treginnis, wrapping around the north of St David's to Treglemais. Another underlies Hayscastle Cross with scattered outcrops elsewhere in the area.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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