The BGS Lexicon of Named Rock Units — Result Details

Mulloch Hill Conglomerate Formation

Computer Code: MLCG Preferred Map Code: MLCG
Status Code: Full
Age range: Rhuddanian Age (SR) — Rhuddanian Age (SR)
Lithological Description: A massive conglomerate with well-rounded pebbles, 2-3 cm in diameter. Some clast blocks are more than 15 cm across. Also some lenses of fossiliferous sandstone.
Definition of Lower Boundary: Unconformably overlies the High Mains Sandstone Formation (HMS) and Drummuck Group (DKG).
Definition of Upper Boundary: Conformably overlain by the Mulloch Hill Sandstone Formation (MLHS).
Thickness: About 100 m thick.
Geographical Limits: Craighead Inlier, Girvan
Parent Unit: Newlands Subgroup (NEWL)
Previous Name(s): Lady Burn Conglomerate (-4798)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Around the nose of the Kirk Hill Anticline, Craighead Inlier, Girvan. From Ladyburn Bridge in the west, including the north slope of Quarrel Hill, to High Mains Farm in the east. 
Reference(s):
Cocks, L R M and Toghill, P, 1973. The biostratigraphy of the Silurian rocks of the Girvan District, Scotland. Journal of the Geological Society of London, Vol. 129, 209-243. 
Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. 
Harper, D A T, 1982. The stratigraphy of the Drummock Group (Ashgill), Girvan. Geological Journal, Vol.17, p.251-277.l. 17 251-277 
Freshney, E C. 1959. An extension of the Silurian succession in the Craighead Inlier, Girvan. Transactions of the Geological Society of Glasghow, Vol. 24, 27-31. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S014