The BGS Lexicon of Named Rock Units — Result Details
Gala Group
| Computer Code: | GALA | Preferred Map Code: | GALA |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Rhuddanian Age (SR) — Telychian Age (ST) | ||
| Lithological Description: | Graded beds that may include wacke sandstone, siltstone and mudstone in variable proportions, interpreted as turbidites. Rare interbedded graptolite-bearing beds. | ||
| Definition of Lower Boundary: | Southern faulted boundary: Laurieston Fault. Stratigraphical lower boundary with underlying Moffat Shale Group [of Ordovician to Silurian (gracilis to sedwickii biozones) age.] | ||
| Definition of Upper Boundary: | Northern faulted boundary: Orlock Bridge Fault. | ||
| Thickness: | c. 6000m of near-vertical strata. | ||
| Geographical Limits: | Mapped from the Rhins of Galloway (Sheet 1/3) to Eyemouth (Sheet 34). Correlation with Central Belt turbidites of Llandovery age in the Ards Peninsula, Northern Ireland. | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Queensberry Grits [Obsolete Name and Code: Use GDE, GALA, GAL1, GAL2, GAL3, GAL4, GAL5, GAL6, GAL7, GAL8]
(-1552)
Gala Group (GALA) Strangford Group [Obsolete Name And Code: Use GALA] (STRN) Gala Group (GALA) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| none recorded or not applicable | |||
| Reference(s): | |||
| Lapworth, C, 1871. On the Lower Silurian rocks in the neighbourhood of Galashiels. Transactions of the Edinburgh Geological Society, 2, 46 - 58. | |||
| Walton, E K. 1955. Silurian greywackes in Peeblesshire. Proceedings of the Royal Society of Edinburgh, B65, 327-357. | |||
| McMillan, A A. 2002. Geology of the New Galloway and Thornhill District. 2002. Memoir of the British Geological Survey. Sheets 9W and 9E (Scotland). | |||
| Barnes, R P, Anderson, T B, and McCurry, J A. 1987. Along-strike variation in the stratigraphical and structural profile of the Southern Uplands Central Belt in Galloway and Longford Down. Journal of the Geological Society, 144, 807-816. | |||
| Lapworth, C and Wilson, J. 1871. On the Silurian rocks in the counties of Roxburgh and Selkirk. Geological Magazine, Vol.8, 456-464. | |||
| Stone, P, 1995. Geology of the Rhins of Galloway district. Memoir of the British Geological Survey, Sheets 1 & 3 (Scotland). | |||
| Peach, B N and Horne, J. 1899. The Silurian Rocks of Britain, Volume 1. Scotland. Memoir of the Geological Survey of the United Kingdom. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S001 S003 S004 S004 S005 S008 S009 S009 S015 S016 S017 S024 S024 S025 S033 S033 S034 N29 S016 S016 S025 S017 S017 S025 | |||