The BGS Lexicon of Named Rock Units — Result Details
Troon Volcanic Member
| Computer Code: | TVL | Preferred Map Code: | TVL |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Namurian Stage (CN) — Namurian Stage (CN) | ||
| Lithological Description: | Olivine microporphyritic basalt (Dalmeny type). | ||
| Definition of Lower Boundary: | Taken at the lithological change from sandy clastic strata of the underlying parent Passage Formation to basaltic lava. | ||
| Definition of Upper Boundary: | Taken at the base of the Ayrshire Bauxitic Clay Member, and defined as the lithological change from olivine basalt to bauxitic clay. The boundary is described as normally gradational. | ||
| Thickness: | To 165 m. | ||
| Geographical Limits: | Presently used within north and central Ayrshire. | ||
| Parent Unit: | Passage Formation (PGP) | ||
| Previous Name(s): | Passage Group Lavas [Obsolete Name and Code: Use TVL]
(-2504)
Troon Volcanic Formation [Obsolete Name and Code: Use TVL] (-1244) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Lugton Water | ||
| Type Section | Gailes Farm Borehole NS33SW/1, from about 32.84m (100.1') to 207.68m (663') depth. | ||
| Reference(s): | |||
| Browne, M A E, Dean, M T, Hall, I H S, McAdam, A D, and Monro, S K. 1995. A review of the lithostratigraphy of the Carboniferous rocks of the Midland Valley of Scotland. BGS Technical Report WA/95/25R. | |||
| 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. | |||
| Browne, M A E, Dean, M T, Hall, I H S, McAdam, A D Monro, S K, and Chisholm, J I. 1999. A lithostratigraphical framework for the Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Research Report RR/99/07. | |||
| Monro, S K. 1999. Geology of the Irvine District. Memoir of the British Geological Survey, Sheet 22W and part of 21E (Scotland). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S022 S014 S014 S022 | |||