The BGS Lexicon of Named Rock Units — Result Details

Farden Member

Computer Code: FDN Preferred Map Code: FDN
Status Code: Full
Age range: Ashgill Series (OA) — Ashgill Series (OA)
Lithological Description: Greyish-green well-bedded silty mudstones with thinly bedded greenish-black fine- to medium-grained sandstones in the upper part. Includes the 3 very fossiliferous Lady Burn Starfish beds (STFB) (A_C) near the top of the member.
Definition of Lower Boundary: Succeeds the largely unbedded siltstones and mudstones of the Lady Burn Formation.
Definition of Upper Boundary: Succeeded by bluish grey soft nodular mudstones of the Cliff Member of the South Threave Formation.
Thickness: c.40m.
Geographical Limits: Girvan area, southwest Scotland.
Parent Unit: South Threave Formation (STHV)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Lady Burn, east of South Threave Farm. 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 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable