BGS mineralogy and petrology collection record

Sample number	E10781; COLLNO182;
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 Saussurite: much crushed & mylonised
Locality details	N.of northern gneiss, Holland Arms
50k map sheet	Caernarfon (105) View images in GeoScenic related to 'Caernarfon' View the geology near 'Caernarfon'
Map reference	SH 470 725
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.