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Ravenstonedale Group

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Ravenstonedale Group
Stratigraphic range: Courceyan to Holkerian substages of Carboniferous
TypeGroup
Sub-unitsRaydale Dolomite, Marsett and Penny Farm Gill formations
UnderliesOrton Group
OverliesSilurian Bannisdale Slates
Thicknessup to 380m
Lithology
Primarylimestone, oolite
Othersandstone, shale
Location
RegionNorthern England
CountryEngland
Type section
Named forRavenstonedale

The Ravenstonedale Group is a Carboniferous lithostratigraphic group (a sequence of rock strata) in the Pennines of northern England. The name is derived from the locality of Ravenstonedale in southeast Cumbria. The rocks of the Ravenstonedale Group have also previously been referred to as the Ravenstonedale Limestone. The group comprises limestones and oolites and some sandstones and shales which reach a maximum thickness of 380m in the Brough area. It is divided into a lower Raydale Dolomite Formation which is overlain by the Marsett Formation and then by an upper Penny Farm Gill Formation.Its base is everywhere an unconformity with Ordovician and Devonian rocks beneath.[1]

References

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  1. ^ "Ravenstonedale Group". The BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved January 4, 2019.
  • The Geological Society (2006). Brenchley, P.J. (ed.). The Geology of England (2. ed.). London: Geological Society Publishing. pp. 194, 195. ISBN 9781862392007.