The BGS Lexicon of Named Rock Units — Result Details
Loch Fad Conglomerate Formation
| Computer Code: | LFC | Preferred Map Code: | LFC |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Arenig Series (OR) — Caradoc Series (O4) | ||
| Lithological Description: | A coarse conglomerate with clasts up to 1m, but more commonly in the 10-50 cm range, consisting mainly of gritty sandstone but with rare serpentinite, chert and 'epidiorite'. The sandy matrix and sporadic sandstone interbeds are strongly cleaved. | ||
| Definition of Lower Boundary: | Not seen, as the formation is a fault-bounded slice within the Highland Boundary Fault system. | ||
| Definition of Upper Boundary: | Not seen, as the formation is a fault-bounded slice within the Highland Boundary Fault system. | ||
| Thickness: | At least 200 m thick. | ||
| Geographical Limits: | The eastern shore of Loch Fad, Isle of Bute, Scotland, restricted to 1:50 k sheet 29E, Dunoon. | ||
| Parent Unit: | Highland Border Complex (HBX) | ||
| Previous Name(s): | Loch Fad Conglomerate [Obsolete Name and Code: Use LFC]
(-2289)
Schistose Conglomerate [Obsolete Name and Code: Use LFC] (-3521) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | The central part of the eastern shore of Loch Fad, Bute. Anderson, 1946. | ||
| Reference(s): | |||
| Anderson, J G C. 1946. The Geology of the Highland Border: Stonehaven to Arran. Transactions of the Royal Society of Edinburgh, Vol.61, 479-515. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S029 S029 | |||