The BGS Lexicon of Named Rock Units — Result Details
Inverclyde Group
| Computer Code: | INV | Preferred Map Code: | INV |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Courceyan Substage (CF) — Chadian Substage (CI) | ||
| Lithological Description: | Sandstones containing pedogenic limestone and dolomite nodules ('cornstones'), fine-grained carbonate as beds, nodules and pebbles, and grey and brown mudstones containing thin beds of limestone and dolomite ('cementstones'); subordinate siltstone and mudstone. | ||
| Definition of Lower Boundary: | At base of Kinnesswood Formation - at incoming of common pedogenic carbonate above a red-bed sequence, the Stratheden Group. Normally conformable, locally unconformable in west. | ||
| Definition of Upper Boundary: | At top of Clyde Sandstone Formation (in west) or of Tyninghame Formation (Lothian) or of Balcomie Beds (Fife); at incoming of coal, blackshale, seatearth or volcanic rocks of the Strathclyde Group; conformable or unconformable. | ||
| Thickness: | To c. 1500m | ||
| Geographical Limits: | Midland Valley of Scotland. | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Cementstone Group
(*172)
Cementstone Group (B) [Obsolete Name And Code: See INV and BGN; CMNT Offshore] (CMST) Cementstone Group (A) [Obsolete Name And Code: See INV and BGN; CMNT Offshore] (CST) Stirling Group [Obsolete Name And Code: Use INV] (SLG) |
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| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Greenock, Inverclyde, Scotland. (Ref Sections: See Type Sections of component units: Kinnesswood, Ballagan, Clyde Sandstone and Tyminghame formations and Balcomie Beds). | ||
| Reference(s): | |||
| Forsyth, I H and Chisholm, J I, 1977. The geology of east Fife. Memoirs of the Geological Survey of Great Britain. | |||
| 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. | |||
| Francis, E H, Forsyth, I H, Read, W A and Armstrong, M. 1970. The geology of the Stirling district. Memoir of the Geological Survey of Great Britain, Sheet 39 (Scotland). | |||
| 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. | |||
| MacGregor, A G, 1960. Division of the Carboniferous on Geological Survey Scottish Maps. Bulletin of the Geological Survey of Great Britain, No.16, 127-130. | |||
| Chisholm, J I and Dean, J M, 1974. The Upper Old Red Sandstone of Fife and Kinross: A fluviatile sequence with evidence of marine incursion. Scottish Journal of Geology, Vol. 10, 1-30. | |||
| Browne, M A E, 1980. The Upper Devonian and Lower Carboniferous (Dinantian) of the Firth of Tay, Scotland. Report of the Institute of Geological Sciences, No. 80/9. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S029 S012 S015 S007 S024 S024 S038 S034 S048 S048 S049 E005 S030 S030 S038 S039 S039 S040 | |||