The BGS Lexicon of Named Rock Units — Result Details

Mouldy Hills Gravel Formation

Computer Code: MOHI Preferred Map Code: MH
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Very poorly-sorted, matrix-rich gravel with boulders comprising angular to subrounded clasts mostly of greywacke sandstone and siltstone with a matrix of yellowish brown, clayey sand. Subordinate beds of both clast-and matrix-supported, stratified diamicton, and lenses of silty sand.
Definition of Lower Boundary: Generally conformable boundary with the underlying Langholm Till Formation; otherwise unconformable contact with bedrock.
Definition of Upper Boundary: Generally at the ground surface, locally a conformable boundary with overlying Flandrian deposits.
Thickness: 20m
Geographical Limits: Southern Uplands of Scotland.
Parent Unit: Southern Uplands Glacigenic Subgroup (SUDR)
Previous Name(s): Morainic Drift [Not Recommended For Future Use: See MORD] (DOD)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Road cutting section on the western side of the A7 [T], 1km south of Langholm, Dumfries-shire. Merritt et al., in preparation 
Reference(s):
McMillan, A A, Merritt, J W, Auton, C A and Golledge, N R [In preparation]. The Quaternary geology of the Solway area. BGS Research Report. 
Lumsden G I, Tulloch W, Howells M F and Davies A. 1967. The geology of the neighbourhood of Langholm. Memoir of the Geological Survey, Sheet 11 (Scotland). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S011