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): Gala Group (GALA)
Queensberry Grits (-1552)
Alternative Name(s): Money Head Formation
Stratotypes:
Reference Section  Coastal section at Strandfoot, south of Money Head. Stone, 1995. 
Reference(s):
Lapworth, C, 1871. On the Lower Silurian rocks in the neighbourhood of Galashiels. Transactions of the Edinburgh Geological Society, 2, 46 - 58. 
Peach, B N and Horne, J. 1899. The Silurian Rocks of Britain, Volume 1. Scotland. Memoir of the Geological Survey of the United Kingdom. 
Walton, E K. 1955. Silurian greywackes in Peeblesshire. Proceedings of the Royal Society of Edinburgh, B65, 327-357. 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S001 S003 N29 S004