The BGS Lexicon of Named Rock Units — Result Details

Gala Unit 3

Computer Code: GAL3 Preferred Map Code: GALA3
Status Code: Full
Age range: Rhuddanian Age (SR) — Rhuddanian Age (SR)
Lithological Description: Graded beds that may include wacke sandstone, siltstone and mudstone in variable proportion, interpreted as turbidites.
Definition of Lower Boundary: Southern faulted boundary: Strandfoot Fault. Stratigraphical lower boundary with underlying Moffat Shale Group (of Ordovician to Silurian age up to the acinaces Biozone).
Definition of Upper Boundary: Northern faulted boundary (Rhins of Galloway): Sandhead Fault.
Thickness: c. 900m of near-vertical strata
Geographical Limits: Restricted to the western side around Money Head on the Rhins of Galloway (Sheet 1/3). Possible correlation with the Central Belt Turbidites of Llandovery age in the Ards Peninsula, Northern Ireland.
Parent Unit: Gala Group (GALA)
Previous Name(s): Queensberry Grits (-1552)
Gala Group (GALA)
Alternative Name(s): Money Head Formation
Stratotypes:
Reference Section  Coastal section at Strandfoot, south of Money Head. Stone, 1995. 
Reference(s):
Peach, B N and Horne, J. 1899. The Silurian Rocks of Britain, Volume 1. Scotland. Memoir of the Geological Survey of the United Kingdom. 
Stone, P, 1995. Geology of the Rhins of Galloway district. Memoir of the British Geological Survey, Sheets 1 & 3 (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. 
Walton, E K. 1955. Silurian greywackes in Peeblesshire. Proceedings of the Royal Society of Edinburgh, B65, 327-357. 
Lapworth, C, 1871. On the Lower Silurian rocks in the neighbourhood of Galashiels. Transactions of the Edinburgh Geological Society, 2, 46 - 58. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S001 S003 N29 S004