Stockdale Group

Stockdale Group
Stratigraphic range: Llandovery epoch of Silurian
TypeGroup
Unit ofWindermere Supergroup
Sub-unitsSkelgill and Browgill formations
UnderliesTranearth Group
OverliesDent Group
Thicknessup to 120m
Lithology
Primarymudstone, siltstone
Location
RegionNorthern England
CountryEngland
Extentsouthern Lake District and Pennine inliers
Type section
Named forStockdale in Longsleddale

The Stockdale Group is a Silurian lithostratigraphic group (a sequence of rock strata) in the southern Lake District and Howgill Fells of the Pennines of northern England. The name is derived from the locality of Stockdale near the top of Longsleddale in Cumbria. It is included within the Windermere Supergroup. The rocks of the Group have also previously been referred to as the Stockdale Shales or Stockdale Subgroup. The group comprises limestones and oolites and some sandstones and shales which reach a maximum thickness of 120m in the area. It is divided into a lower Skelgill Formation which is overlain by an upper Browgill Formation.[1]

References

  1. ^ "Stockdale Group". The BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved January 20, 2019.
  • The Geological Society (2006). Brenchley, P.J. (ed.). The Geology of England (2. ed.). London: Geological Society Publishing. pp. 124–126. ISBN 9781862392007.