| Computer Code: |
OFS |
Preferred Map Code: |
OFS |
| Status Code: |
Full |
| Age range: |
Late Devonian Epoch (DU)
— Tournaisian Age (CT) |
| Lithological Description: |
Greyish green conglomerates, sandstones, siltstones and reddish brown and green silty and sandy mudstones. Typically in upward-fining cycles. |
| Definition of Lower Boundary: |
Conglomerate with subordinate sandstone layers rests with sharp base on reddish purple shaly mudstone of the Merevale Shale Formation. |
| Definition of Upper Boundary: |
Greyish green massive siltstone with mudstone fragments and large roots in the top 15cm (Oldbury Sandstone Formation) is sharply overlain by pale grey sandstone with carbonised woody fragments (Millstone Grit). |
| Thickness: |
152m true thickness in Merevale No.2 Borehole. |
| Geographical Limits: |
From just south of Outwoods (SP 2975 9614) southeastward to just southeast of Moor Wood Farm (SP 3133 9417). |
| Parent Unit: |
Portishead Subgroup (POB)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Borehole No. SP39NW/6 (Merevale No.2) 176' 8" - 701' 0" (Taylor and Rushton, 1971). |
| Reference(s): |
| Taylor, K and Rushton, A W A, 1971. The pre-Westphalian geology of the Warwickshire Coalfield. Bulletin of the Geological Survey of Great Britain, No.35. |
| Waters, C N, Smith, K, Hopson, P M, Wilson, D, Bridge, D M, Carney, J N, Cooper, A H, Crofts, R G, Ellison, R A, Mathers, S J, Moorlock, B S P, Scrivener, R C, McMillan, A A, Ambrose, K, Barclay, W J, and Barron, A J M. 2007. Stratigraphical Chart of the United Kingdom: Southern Britain. British Geological Survey, 1 poster. |
| Bridge, D M, Carney, J N, Lawley, R S, and Rushton, A W A. 1998. Geology of the country around Coventry and Nuneaton. Memoir of the British Geological Survey, Sheet 169 (England and Wales). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E169
|
