The BGS Lexicon of Named Rock Units — Result Details
Crag Limestone
Computer Code: | CGLM | Preferred Map Code: | notEntered |
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Status Code: | Index Level | ||
Age range: | Pendleian Substage (CE) — Pendleian Substage (CE) | ||
Lithological Description: | Dark grey, fine-grained limestone; might pass westwards into dark ferruginous shelly sandstone (Lexique Stratigraphique). | ||
Definition of Lower Boundary: | none recorded or not applicable | ||
Definition of Upper Boundary: | none recorded or not applicable | ||
Thickness: | To c. 2 m. | ||
Geographical Limits: | Parts of North Yorkshire and Northumberland (Limedale, Teesdale, Weardale, East Allendale and westwards to West Allendale and the Alston district. | ||
Parent Unit: | Stainmore Formation (SMGP) | ||
Previous Name(s): | none recorded or not applicable | ||
Alternative Name(s): | Oakwood Limestone Crow Limestone |
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Stratotypes: | |||
none recorded or not applicable | |||
Reference(s): | |||
Dean, M T, Browne, M A E, Waters, C N and Powell, J H. 2011. A lithostratigraphical framework for the Carboniferous successions of northern Great Britain (onshore). British Geological Survey Research Report, RR/10/007. 165pp. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E032 E025 E024 E020 E031 E026 |