BGS mineralogy and petrology collection record

Sample number	E11054; COLLNO135;
Sample Donor	Matley, C.A
Rock name	'Original entry: Biotite Gneiss'
Stratigraphy	Not entered
Comments	Mona Complex. The Gneisses. See Mem.Geol.of Anglesey.p.292. Qtz., albite, oligoclase, both micas. Foliated but sub gr??.d(?)
Locality details	Pen-Bryn-yr-Eglwys.
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 292 925
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.