The Cullaidh Shale Formation is a geological formation in Scotland, and the lowermost unit of the Great Estuarine Group. It is Bajocian in age. The lithology largely consists of organic rich mudstone and shales, including oil shale developed near the base.[1]

References

  1. ^ "BGS Lexicon of Named Rock Units - Result Details".
Allikas: https://en.wikipedia.org/wiki/Cullaidh_Shale_Formation
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