BGS mineralogy and petrology collection record

Sample number	E10772; COLLNO173;
Sample Donor	Blake,Professor
Rock name	'Original entry: Hornblende Gneiss'
Stratigraphy	Not entered
Comments	Mona Complex. The Gneisses. See Mem.Geol.of Anglesey.pp.376-7 Rich in epidote. Albite vein with actinalite
Locality details	Gaerwen Windmill
50k map sheet	Caernarfon (105) View images in GeoScenic related to 'Caernarfon' View the geology near 'Caernarfon'
Map reference	SH 486 720
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.