| 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
|
| Stratotypes: |
| Type Section |
Lochside exposures, Glenbuck Loch, 0.4km north-north-west of Parish Holm Farm. |
| Reference(s): |
| 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
|
