The BGS Lexicon of Named Rock Units — Result Details
Townburn Sandstone Member
| Computer Code: | TWN | Preferred Map Code: | Twn |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Namurian Stage (CN) — Westphalian Stage (CW) | ||
| Lithological Description: | Medium- to coarse-grained sandstone with conglomeratic bands. | ||
| Definition of Lower Boundary: | Unconformable on Lower Palaeozoic turbidites; locally rests on Lower Carboniferous strata. | ||
| Definition of Upper Boundary: | Overlain by Lower Coal Measures strata. | ||
| Thickness: | 41.55m in Crichope Linn Borehole. | ||
| Geographical Limits: | Thornhill basin at Closeburn, Keir, Eccles, River Nith (Drumlanrig), Hapland, Fellend, Townhead and Morton Wood. | ||
| Parent Unit: | Passage Formation (PGP) | ||
| Previous Name(s): | Passage Group (Undivided) [Obsolete Name and Code: Use TWN]
(-1879)
Crichope Sandstone Member [Obsolete Name And Code: Use TWN] (CPE) [Obsolete Code: Use TWN] (*871) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Between 161.39 and 202.94m in the Crichope Linn Borehole, Thornhill, 800m west of Benthead. | ||
| Reference Section | Townburn Wood, Closeburn. In the Town Burn, 650m northeast of Barraby Farm, Closeburn. | ||
| Reference(s): | |||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S009 S015 | |||