Cullaidh Shale Formation

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Cullaidh Shale Formation
Stratigraphic range: Bajocian
Cullaidh Shale Sill.jpg
Black shale of the Cullaidh Shale Formation overlain by a sill
TypeGeological formation
Unit ofGreat Estuarine Group
UnderliesElgol Sandstone Formation
OverliesBearreraig Sandstone Formation
Thicknessup to 6 metres (20 ft)
Lithology
PrimaryShale, Mudstone
OtherSandstone
Location
RegionEurope
Country Scotland
ExtentInner Hebrides

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 lithlology largely consists of organic rich mudstone and shales, including oil shale developed near the base.[1]

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