The BGS Lexicon of Named Rock Units — Result Details

Gully Redbed Formation

Computer Code: GRD Preferred Map Code: GRD
Status Code: Full
Age range: Wenlock Epoch (SW) — Wenlock Epoch (SW)
Lithological Description: Reddish-brown silty mudstone, siltstones and shales, some fine laminations. Some very small scale cross-bedding; slightly micaceous.
Definition of Lower Boundary: Transitional boundary; upper surface of highest greyish-coloured sandstone or siltstone of the underlying Fish Bed Formation.
Definition of Upper Boundary: Base of lowest bed of conglomerate in the overlying Hareshaw Conglomerate.
Thickness: 95m
Geographical Limits: Lower Palaeozoic Inlier of the Hagshaw Hills, Scotland (50k sheets 23W, 23E and 15W).
Parent Unit: Glenbuck Group (GBK)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Lochside exposures, Glenbuck Loch, 0.4km north-north-west of Parish Holm Farm. 
Rolfe, W D I, 1961. The Geology of the Hagshaw Hills Silurian Inlier, Lanarkshire. Transactions of the Edinburgh Geological Society, Vol.18, Part 3, 240-269. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S023 S023 S015