The BGS Lexicon of Named Rock Units — Result Details
Gullane Formation
| Computer Code: | GUL | Preferred Map Code: | GUL |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Chadian Substage (CI) — Holkerian Substage (CQ) | ||
| Lithological Description: | Mainly pale sandstones interbedded with grey to dark grey mudstones and siltstones. Subordinate coal, seatrock, ostracod-limestone/dolomite and sideritic ironstone. Thin marine bands also occur. | ||
| Definition of Lower Boundary: | The base is taken at the top of the Garleton Hills, Arthurs Seat or equivalent volcanic beds, where present; elsewhere at the lowest carbonaceous, coaly or rooty beds. | ||
| Definition of Upper Boundary: | The top is drawn at the base of the lowest of the Macgregor Marine Bands (Wilson, 1974). | ||
| Thickness: | Spilmersford Borehole 132m, Skateraw Borehole 121m+, Birnieknowes Borehole 150m. Estimated thickness in Edinburgh area is c. 560m. | ||
| Geographical Limits: | Lothians; south Fife; Berwickshire. | ||
| Parent Unit: | Strathclyde Group (SYG) | ||
| Previous Name(s): | Lower Oil-Shale Group (Part) [Obsolete Name and Code: Use GUL]
(-4074)
Oxroad Group Tuffs [Obsolete Name And Code: Part Of GUL] (OGT) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Spilmersford Borehole NT46SE/73 from 155.44 - 287.27m depth. | ||
| Partial Type Section | Coastal section at Cockburnspath. (McAdam and Clarkson 1986; Greig, 1988). | ||
| Reference(s): | |||
| Chisholm, J I, MacAdam, A D, Brand, P J. 1989. Lithostratigraphical classification of Upper Devonian and Lower Carboniferous rocks in the Lothians. British Geological Survey Technical Report, WA/89/26. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S024 S032 S032 S033 S033 S034 S040 S040 S041 | |||