The BGS Lexicon of Named Rock Units — Result Details
Coedana Complex
Computer Code: | COED | Preferred Map Code: | notEntered |
---|---|---|---|
Status Code: | Pending Upgrade | ||
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 Available (!) | ||
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. | ||
Type Area | Central Anglesey, between Llysdulas and Llanfaelog, and Carmel Head. Greenly, 1919. | ||
Reference Section | Gwalchmai Quarry, 1 km northwest of Gwalchmai village. Horak in Carney et al., 2000. | ||
Reference(s): | |||
Gibbons, W, Tietzch-Tyler, D, Horak, J M and Murphy, F C. 1994. Precambrian rocks in Anglesey, southwest Llyn and southeast Ireland. 75-84. In 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 D'Lemos, R S, Strachan, R A and Topley, C G (editors),The Cadomian Orogeny. 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: H.M.S.O.). | |||
Carney J N et al. 2000. Precambrian rocks of England and Wales. Geological Conservation Review Series. No 20. [Peterborough: Joint Nature Conservation Committee]. 252pp. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E094 E093 E105 |