The BGS Lexicon of Named Rock Units — Result Details
Ardwell Subgroup
Computer Code: | AWL | Preferred Map Code: | AWL |
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Status Code: | Full | ||
Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
Lithological Description: | Sandstone, siltstone, mudstone, limestone and conglomerate; highly fossiliferous in places (shelly faunas). | ||
Definition of Lower Boundary: | Coincides with lower boundary of the Balclatchie Formation (on coastal outcrops) and lower boundary of the Craighead Limestone Formation (in the Craighead Inlier). | ||
Definition of Upper Boundary: | Coincides with upper boundary of the Ardwell Farm Formation. | ||
Thickness: | To c.1600m | ||
Geographical Limits: | Girvan area, southwest Scotland. | ||
Parent Unit: | Ardmillan Group (AMN) | ||
Previous Name(s): | Ardmillan Group
(AMN)
Ardmillan Group (AMN) |
||
Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | Coast south of Girvan, southwest Scotland. Williams, 1962. See also consituent Ardwell Farm, Balclatchie and Craighead Limestone formations. | ||
Reference(s): | |||
Williams, A, 1962. The Barr and Lower Ardmillan Series (Caradoc) of the Girvan district, southwest Ayrshire, with descriptions of the Brachiopoda. Memoir of the Geological Society of London, No.3. | |||
Fortey, R A, Harper, D A T, Ingham, J K, Owen, A W, Parkes, M A, Rushton, A W A and Woodcock, N H. 2000. A revised correlation of Ordovician rocks in the British Isles. Geological Society Special Report, No.24. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
none recorded or not applicable |