The BGS Lexicon of Named Rock Units — Result Details

Glenmard Mudstone Member

Computer Code: GMD Preferred Map Code: GMD
Status Code: Full
Age range: Ashgill Series (OA) — Ashgill Series (OA)
Lithological Description: At least four discrete mudflows, with olistoliths of green mudstones, rottenstone and shelly debris, separated by bedded mudstone and thinly bedded sandstone.
Definition of Lower Boundary: Base of lowest mudflow unit with olistoliths.
Definition of Upper Boundary: Succeeded by normal bedded mudstones of the Quarrel Hill Formation.
Thickness: c.20m
Geographical Limits: Girvan area, southwest Scotland.
Parent Unit: Quarrel Hill Formation (QHF)
Previous Name(s): Lower Mudstones (-936)
Alternative Name(s): none recorded or not applicable
Type Section  Glenmard Quarry, Craighead Inlier, Girvan. Harper, 1982. 
Harper, D A T, 1982. The stratigraphy of the Drummock Group (Ashgill), Girvan. Geological Journal, Vol.17, p.251-277.l. 17 251-277 
Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable