| Computer Code: |
BRLG |
Preferred Map Code: |
BRLG |
| Status Code: |
Full |
| Age range: |
Tournaisian Age (CT)
— Tournaisian Age (CT) |
| Lithological Description: |
Grey and white cross-bedded sandstones with thin lenticular beds of grey mudstone and carbonised plant debris (Paterson and Hall, 1986; BGS, 1990). In the northern part of the Leapmoor Plantation [NS 221 715], it consists of white and cream, trough cross-stratified sandstone with thin lenticular beds of grey siltstone and abundant coalified wood fragments (Paterson et al., 1990). |
| Definition of Lower Boundary: |
The base is not seen, but is mapped in Broadlee Glen [NS 2258 7134] and distinguished from underlying strata of the undivided Clyde Sandstone Formation by plant debris and beds of grey mudstone in the Broadlee Glen Sandstone Member (BGS, 1990). Paterson and Hall (1986) presumed that the unseen base of the Broadlee Glen Sandstone Member is transitional on white sandstones and red-brown mudstones of the Gourock Sandstone Member. |
| Definition of Upper Boundary: |
Top not seen, presumed overlain by Clyde Plateau Volcanic Formation (Paterson and Hall, 1986). |
| Thickness: |
Greater than 100 m. |
| Geographical Limits: |
South of the River Clyde and also west of the Largs Fault Zone in Strathclyde, Scotland. |
| Parent Unit: |
Clyde Sandstone Formation (CYD)
|
| Previous Name(s): |
Broadlee Glen Sandstones Formation
(-83)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Broadlee Glen, near Greenock, Strathclyde, Scotland. |
| Reference(s): |
| Paterson, I B and Hall, I H S. 1986. Lithostratigraphy of the late Devonian and early Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Report, 18/3. |
| British Geological Survey. 1990. Greenock Sheet 30W, 1:50 000 Series (Scotland), Solid. (Keyworth, Nottingham: British Geological Survey.) |
| Dean, M T, Browne, M A E, Waters, C N and Powell, J H. 2011. A lithostratigraphical framework for the Carboniferous successions of northern Great Britain (onshore). British Geological Survey Research Report, RR/10/007. 165pp. |
| Paterson, I B, Hall, I H S and Stephenson, D. 1990. Geology of the Greenock district: Memoir for 1:50000 geological sheet 30W and part of sheet 29E (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S030
|
