The BGS Lexicon of Named Rock Units — Result Details
Greenan Castle Pyroclastic Member
| Computer Code: | GCP | Preferred Map Code: | GCP |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Chadian Substage (CI) — Asbian Substage (CR) | ||
| Lithological Description: | Bedded pyroclastic rocks and volcaniclastic sedimentary rocks comprising lithic lapilli tuffs and tuffs. | ||
| Definition of Lower Boundary: | Where seen overlying sandstones, mudstones and cementstones of the underlying Ballagan Formation on the shore at Greenan Castle, possibly disconformable on (lithified) Ballagan Formation. | ||
| Definition of Upper Boundary: | Unconformably overlain by mudstones and sandstones of the Lawmuir Formation on the shore at Greenan Castle. | ||
| Thickness: | Thickness of 23 m at Greenan Castle in the Ayr district, yet dies out laterally. | ||
| Geographical Limits: | A local unit on the shore and around Greenan Castle (south of Ayr, Scotland), which dies out approximately 1km inland. | ||
| Parent Unit: | Clyde Plateau Volcanic Formation (CPV) | ||
| Previous Name(s): | Bedded agglomerate of Greenan Castle [Obsolete Name and Code: Use GCP]
(-2199)
Greenan Castle Ash [Obsolete Name and Code: Use GCP] (-2200) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | On the shore and in the cliff at Greenan Castle, south of Ayr, Scotland. Eyles, et al., 1949; Whyte, 1964, 1992. | ||
| 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. | |||
| Stephenson, M H, Williams, M, Monaghan, A, Arkley, S, and Smith, R A. 2002. Biostratigraphy and palaeoenvironments of the Ballagan Formation (lower Carboniferous) in Ayrshire, SW Scotland. Scottish Journal of Geology, Vol.38, 93-111. | |||
| Eyles, V A, Simpson, J B, and Macgregor, M C. 1949. Geology of Central Ayrshire. Memoir of the Geological Survey of Scotland, British Geological Survey, Sheet 14 (Scotland). | |||
| Sowerbutts, A A. 1999. Geology of the Dunure, Carrick Hills and Heads of Ayr area. BGS Technical Report, WA/99/102. | |||
| Whyte, F. 1992. Heads of Ayr. In: Lawson, J D and Weedon, W S (Eds), Geological excursions around Glasgow and Girvan. | |||
| Whyte, F. 1964. The Heads of Ayr Vent. Transactions of the Geological Society of Glasgow, Vol.25, 72-97. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S014 | |||