The BGS Lexicon of Named Rock Units — Result Details

Quarrel Hill Formation

Computer Code: QHF Preferred Map Code: QHF
Status Code: Full
Age range: Cautleyan Stage (OU) — Cautleyan Stage (OU)
Lithological Description: Green, purple-stained, bedded mudstones with thin subsidiary sandstone beds, conglomerate and mass-flow deposits with olistoliths.
Definition of Lower Boundary: Conformably overlies the Auldthorns Formation. The boundary is taken at the change from the alternating sandstone (dominant) and silty mudstone succession of the Auldthorns Formation to the fossiliferous green purple-stained bedded mudstones with thin subsidiary sandstones of the Quarrel Hill Formation.
Definition of Upper Boundary: Conformably overlain by the Lady Burn Formation. The poorly defined boundary is taken at the change from fossiliferous green, purple-stained bedded mudstones with thin subsidiary sandstones of the Quarrel Hill Formation into the more massive, nodular pale grey unbedded silty mudstones of the Lady Burn Formation.
Thickness: 115m
Geographical Limits: Craighead Inlier, Girvan, southwest Scotland.
Parent Unit: Drummuck Subgroup (DKG)
Previous Name(s): Quarrel Hill Flags (-2990)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Farden Burn, Craighead Inlier, Girvan. Harper, 1962. 
Type Area  Craighead Inlier, Sheet SO14W. (Farden Burn). 
Reference(s):
Harper, D A T, 1982. The stratigraphy of the Drummock Group (Ashgill), Girvan. Geological Journal, Vol.17, p.251-277.l. 17 251-277 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S014