| Computer Code: |
RHN |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
| Lithological Description: |
Conglomerate, shale, sandstone and siltstone, with intercalated andesitic and rhyolitic lava and ash, and thin chert bands. Comprises entire Old Red Sandstone of Bogie outlier, and possibly also the Cabrach outlier. |
| Definition of Lower Boundary: |
Unconformity on Dalradian metasediments and Caledonian plutonic rocks. |
| Definition of Upper Boundary: |
Removed by erosion. |
| Thickness: |
970 metres in type localities for each formation; maximum thickness probably 2100 metres in Kildrummy (NJ 46 18) area. |
| Geographical Limits: |
Grampian Highlands, Scotland. |
| Parent Unit: |
Old Red Sandstone Supergroup (ORS)
|
| Previous Name(s): |
Old Red Sandstone of Rhynie and Cabrach Outliers [Obsolete Name and Code: Use RHN]
(-3638)
|
| Alternative Name(s): |
Corvie Group
|
| Stratotypes: |
| Type Area |
Rhynie area, Sheet 76W, Scotland. See individual formations for more detailed localities: Dryden, Quarry Hill, Tillybrachty, Carlinden and Corbie's Tongue Formations. |
| Reference(s): |
| Stephenson, D and Gould, D. 1995. British Regional Geology: the Grampian Highlands (4th edition). (London: HMSO for the British Geological Survey.) |
| Waters, C N, Gillespie, M R, Smith, K, Auton, C A, Floyd, J D, Leslie, A G, Millward, D, Mitchell, W I, McMillan, A A, Stone, P, Barron, A J M, Dean, M T, Hopson, P M, Krabbendam, M, Browne, M A E, Stephenson, D, Akhurst, M C, and Barnes, R P. 2007. Stratigraphical Chart of the United Kingdom: Northern Britain. (British Geological Survey.) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S076
S086
|
