BGS mineralogy and petrology collection record

Sample number	E10698; COLLNO99;
Sample Donor	Blake,Professor
Rock name	'Original entry: Ashy Grit'
Stratigraphy	Not entered
Comments	Mona Complex. Tyfry Beds. See Mem.Geol.of Anglesey.p.349 Angular fragments of albite keratophyre & quartz. Matrix foliated
Locality details	Cerig-ddwyfford
50k map sheet	Caernarfon (105) View images in GeoScenic related to 'Caernarfon' View the geology near 'Caernarfon'
Map reference	SH 45 75
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.