BGS mineralogy and petrology collection record

Sample number	E10638; COLLNO39;
Sample Donor	Blake,Professor
Rock name	'Original entry: Hornblende-Gneiss'
Stratigraphy	Not entered
Comments	see mem.geology of Anglesey Yr 1919 cf p 292 Similar composition and texture but rather finer. Later? Mylonization Mona Complex The Gneisses
Locality details	Pen bryn-yr-Eglwys near summit
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 294 924
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.