BGS mineralogy and petrology collection record

Sample number	E11378; COLLNO69;
Sample Donor	Greenly,E.
Rock name	'Original entry: Powder Of Acid Band In Basic Gneiss. Sillimanite (Sillimanite & Bio Gneiss)'
Stratigraphy	Not entered
Comments	Mona Complex. The Gneisses. See Mem.Geol.of Anglesey.pp.322-3 Sillimanite etc. Residues
Locality details	Adjoining E.side S.end of Werthyr alluvium
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 374 778
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.