| Computer Code: |
COEDG |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Ediacaran Period (AD)
— Ediacaran Period (AD) |
| Lithological Description: |
Porphyritic alkali-feldspar granite, commonly mylonitised. |
| Definition of Lower Boundary: |
Unknown. |
| Definition of Upper Boundary: |
Unknown. |
| Thickness: |
Unknown. |
| Geographical Limits: |
Anglesey, North Wales. |
| Parent Unit: |
Coedana Complex (COED)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Partial Type Section |
Gwalchmai Quarry. 1 km northwest of Gwalchmai village, Anglesey. Horak and Gibbons, 2000. |
| Reference(s): |
| 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.). |
| Shackleton, R M. 1969. The Pre-Cambrian of North Wales. 1-22 in Wood, A (editor), The Pre-Cambrian and Lower Palaeozoic rocks of Wales. [Cardiff: University of Wales Press.] |
| Shackleton, R M, 1954. The structure and succession of Anglesey and the Lleyn Peninsula. British Association for the Advancement of Science, Vol.11, p.106-108. |
| Horak, J M. 1993. The late Precambrian Coedana and Sarn Complexes, northwest Wales - a geochemical and petrological study. PhD thesis, University of Wales. |
| Horak, J M and Gibbons, W. 2000. Anglesey and the Lleyn Peninsula (Llyn). 145-179 in Carney, J (editor), Precambrian rocks of England and Wales. Geological Consrvation Review Series, 20. [Peterborough: Joint Nature Conservation Committee.] |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
