The BGS Lexicon of Named Rock Units — Result Details
Coedana Complex
| Computer Code: | COED | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Ediacaran Period (AD) — Ediacaran Period (AD) | ||
| Lithological Description: | Migmatitic pelites and semi-pelites, calc-silicate gneisses, amphibolites and granite, with hornfelsed aureole. | ||
| Definition of Lower Boundary: | Unknown. | ||
| Definition of Upper Boundary: | Unknown. | ||
| Thickness: | Unknown. | ||
| Geographical Limits: | Anglesey Special 1:50 000 Geological Sheet, but unit probably extends offshore. Comprises a belt of rocks that extends NE-SW across central Anglesey, but is also found in thrust slices in NW Anglesey, and in inliers surrounded by younger strata. Lateral boundaries unknown; certainly faulted in part, but with igneous contacts and metamorphic gradients also. | ||
| Parent Unit: | Not Applicable (-) | ||
| Previous Name(s): | Coedana Granite
(COEDG)
Coedana Granite (COEDG) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | Maen-Gwyn Farm, 1.9 km south southwest of Llanerchyinedd. Exposures in farmyard and around immediate vicinity. Horak in Carney et al., 2000. | ||
| Reference Section | Gwalchmai Quarry, 1 km northwest of Gwalchmai village. Horak in Carney et al., 2000. | ||
| Type Area | Central Anglesey, between Llysdulas and Llanfaelog, and Carmel Head. Greenly, 1919. | ||
| Reference(s): | |||
| Gibbons, W, Tietzch-Tyler, D, Horak, J M, and Murphy, F C. 1994. 75-84 in Precambrian rocks in Anglesey, southwest Llyn and southeast Ireland. Gibbons, W, and Harris, A L (editors). A revised correlation of Precambrian rocks in the British Isles. Geological Society of London Special Report No. 22. | |||
| Gibbons, W, and Horak, J. 1990. Contrasting metamorphic terranes in northwest Wales. 315-327 in The Cadomian Orogeny. D'Lemos, R S, Strachan, R A, and Topley, C G (editors). Geological Society of London Special Publication No. 51. | |||
| Greenly, E. 1919. The geology of Anglesey, Vol 1. Memoir of the Geological Survey of Great Britain (England and Wales). (London: HMSO.) | |||
| Carney J N, et al. 2000. Precambrian rocks of England and Wales. Geological Conservation Review Series. No 20. (Peterborough: Joint Nature Conservation Committee.) 252 pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E094 E093 E105 | |||