The BGS Lexicon of Named Rock Units — Result Details
Carrock Gabbro-Microgranite Intrusions
| Computer Code: | CFCOC | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
| Lithological Description: | A microgabbro, cutting the main mass of micrographic microgranite, a narrow marginal zone of apatite-bearing, iron-rich gabbro, microdiorite, micromonzodiorite and microgranite. Radiometric age: microgranite 452.4 +/- 4.1 Ma (U-Pb, zircon) (Millward, D and Evans, J A, 2003.) | ||
| Definition of Lower Boundary: | Not defined. | ||
| Definition of Upper Boundary: | Not defined. | ||
| Thickness: | A near-vertical sheet like mass emplaced with the Carrock Fell Complex. | ||
| Geographical Limits: | Carrock Fell, Cumbria. | ||
| Parent Unit: | Carrock Fell Complex (CFCO) | ||
| Previous Name(s): | Carrock Granophyre
(-764)
Carrock Gabbro-Microgranite Division [Obsolete Name and Code: Use CFCOC] (-2682) Carrock Series [Obsolete Name and Code: Use CFCOC] (-2683) Carrock Diabase [Obsolete Name and Code: Use CFCOC] (-3915) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Carrock Fell. Millward (1999). | ||
| Reference Section | Further Gill Sike. Millward (1999). | ||
| Reference(s): | |||
| Millward, D. Carrock Fell. 198-204 in Stephenson, D, Bevins, R E, Millward, D, Highton, A J, Parsons, I, Stone, P and Wadsworth, W J. 1999. Caledonian Igneous Rocks of Great Britain. Geological Conservation Review Vol. 17. (Peterborough: Joint Nature Conservation Committee.) | |||
| Harker, A, 1894. Carrock Fell: A study in the variation of igneous rock masses. Part 1. The Gabbro. Quarterly Journal of the Geological Society, London, Vol.50, 311-337. | |||
| Millward, D. 2002. Early Palaeozoic magmatism in the English Lake District. Proceedings of the Yorkshire Geological Society, Vol. 54, Part 2, 65-93. | |||
| Hunter, R H and Bowden, N, 1990. Itinerary 3: The Carrock Fell Igneous Complex. 57-67 in Moseley, F (ed.) The Lake District. Geologists' Association Guide. | |||
| Millward, D, and Evans, J A. 2003. U-Pb chronology and duration of Upper Ordovician magmatism in the English Lake District. Journal of the Geological Society of London, Vol. 160, 773-781. | |||
| Hunter, R H, 1980. The petrology and geochemistry of the Carrock Fell Gabbro-granophyre Complex, Cumbria. (University of Durham: PhD thesis.) | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E023 | |||