| Computer Code: |
BCG |
Preferred Map Code: |
BCG |
| Status Code: |
Full |
| Age range: |
Arenig Series (OR)
— Arenig Series (OR) |
| Lithological Description: |
Pillowed and massive, porphyritic and aphyric lavas with local red horizons suggestive of subaerial weathering. |
| Definition of Lower Boundary: |
Overlies Slockenray Formation. |
| Definition of Upper Boundary: |
Faulted against Kennedy's Pass Formation and younger rocks of the Barr and Ardmillan groups. |
| Thickness: |
c.285m |
| Geographical Limits: |
Girvan - Ballantrae area, southwest Scotland. |
| Parent Unit: |
Balcreuchan Group (BCN)
|
| Previous Name(s): |
Brandy Craig Formation [Obsolete Name and Code: Use BCG]
(-3822)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Coast south of Kennedy's Pass, Girvan, southwest Scotland. Stone, P and Smellie, J L, 1988. |
| Reference(s): |
| Stone, P and Smellie, J L, 1988. Classical areas of British Geology: The Ballantrae area: a description of the solid geology of parts of 1:25 000 sheets NX 08, 18 and 19. [London: HMSO for British Geological Survey.] |
| Peach, B N and Horne, J. 1899. The Silurian Rocks of Britain, Volume 1. Scotland. Memoir of the Geological Survey of the United Kingdom. |
| Bluck, B J. 1982. Hyalotuff deltaic deposit in the Ballantrae Ophiolite of SW Scotland: evidence for the crustal position of the lava sequence. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol. 72 (for 1981), 217-228. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
