The BGS Lexicon of Named Rock Units — Result Details

Stone Gill Limestone Formation

Computer Code: STE Preferred Map Code: STE
Status Code: Pending Upgrade
Age range: Chadian Substage (CI) — Chadian Substage (CI)
Lithological Description: Can be divided informally into a lower unit of interbedded porcellanous limestones, argillaceous limestones, sandstones and mudstones c.25 metres thick and an upper unit of mostly porcellanous limestone with some flaggy dolomites c. 55 metres + thick. Overlying Coldbeck Limestone comprises dark grey, fine-grained limestones with interbedded mudstone and flaggy dolomite in which algal macrostructures are common. Underlying Shap Conglomerate comprises green/brown/red sandstones, siltstones mudstones and conglomerates.
Definition of Lower Boundary: At depth of 49.73 metres in Wyegarth Gill No.1 Borehole (NY 7201 0355).
Definition of Upper Boundary: Overlain by Coldbeck Limestone Formation.
Thickness: Estimated thickness in Ravenstonedale area (based on Wyegarth Gill No.1 Borehole and Stone Gill) is about 100m. It thins slightly westward to c.80m on NY60NW.
Geographical Limits: Not defined.
Parent Unit: Ravenstonedale Group (RVS)
Previous Name(s): Stone Gill Limestone (-2454)
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Pattison, J. 1990. Geology of the Orton and Sunbiggin Tarn districts. Geological notes and local details for 1:10,000 Sheets NY60NW and NY60NE and part of 1:50,000 Sheets 30 (Appleby), 31 (Brough), 39 (Kendal) and 40 (Kirkby Stephen). British Geological Survey Onshore Geology Series, Technical Report, WA/90/12. 
Garwood, E J. 1907. Geology of Teignmouth Parish, ("History of Northumberland"). Museum Pamphlet, Northumberland, p.73. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E040