BGS mineralogy and petrology collection record

Sample number	E10872; COLLNO273;
Sample Donor	Blake,Professor
Rock name	'Original entry: Biotite-Gneiss'
Stratigraphy	Not entered
Comments	see mem. Geology of Anglesey p 324 Albite, Biotite, Sphere, Apatite etc. Well foliated Mona Complex The Gneisses
Locality details	Valley S. of Llechaynfarwydd
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 380 809
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.