BGS mineralogy and petrology collection record

Sample number	E10845; COLLNO246;
Sample Donor	Blake,Professor
Rock name	'Original entry: Biotite Gneiss Albite Biotite Gneiss'
Stratigraphy	Not entered
Comments	see mem. Geology of Anglesey p 328 Mona Complex The Gneisses
Locality details	Penchyn Glas N. of Llanwenllwyfo
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 492 911
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.