The BGS Lexicon of Named Rock Units — Result Details
John O'Groats Sandstone Formation
| Computer Code: | JOG | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Pending Upgrade | ||
| Age range: | Givetian Age (DV) — Givetian Age (DV) | ||
| Lithological Description: | Red sandstones, with sporadic bands of flagstone, thin impure limestone and shale. | ||
| Definition of Lower Boundary: | Drawn at the base of thin impure sandstone of the John O'Groats Sandstone Formation where it rests unconformably upon thin limestones of the Upper Caithness Flagstone Subgroup. | ||
| Definition of Upper Boundary: | The red sandstone of this Formation is not overlain. | ||
| Thickness: | c.609m | ||
| Geographical Limits: | Caithness, Northern Highlands, Scotland, Grampian Region. | ||
| Parent Unit: | Eday Group (EDY) | ||
| Previous Name(s): | John O'Groats Sandstone and Flagstone Group [Obsolete Name and Code: Use JOG]
(-4112)
John O'Groats Sandstone Group (-983) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | John O'Groat's House, Caithness, on the shore. | ||
| Reference(s): | |||
| Crampton, C B and Carruthers, R G, 1914. The geology of Caithness. Memoir of the Geological Survey, Scotland. Sheets 110 and 116 (Scotland). | |||
| House, M R, Richardson, J B, Chaloner, W G, Allen, J R L, Holland, C H and Westoll, T S. 1977. A Correlation of Devonian rocks of the British Isles. Geological Society of London, Special Report No.8, Scottish Academic Press, Edinburgh. | |||
| Geikie, A, 1879. On the Old Red Sandstone of Western Europe. Transactions of the Royal Society of Edinburgh, Vol.28, p.374-404. | |||
| Phemister, J. 1948. British Regional Geology: Scotland: the Northern Highlands (2nd edition) (Edinburgh: HSMO for the Geological Survey and Museum.) | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S116 S115 | |||