The BGS Lexicon of Named Rock Units — Result Details
Crag Limestone
| Computer Code: | CGLM | Preferred Map Code: | notEntered |
|---|---|---|---|
| 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. 165 pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E032 E025 E024 E020 E031 E026 | |||