BGS mineralogy and petrology collection record

Sample number	E10677; COLLNO78;
Sample Donor	Blake,Professor
Rock name	'Original entry: Mica Schist Grey Gneiss'
Stratigraphy	Not entered
Comments	see mem. Geology of Anglesy p 343 Quartz, Alkali Feldspar Well foliated but Micas feebly developed Palaeozoic Peru Zone
Locality details	N. of Klangwyllog stream; locality vague but probably NW. of Llangwyllog Church
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 434 797
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.