BGS mineralogy and petrology collection record

Sample number	E10874; COLLNO275;
Sample Donor	Blake,Professor
Rock name	'Original entry: Spilite'
Stratigraphy	Not entered
Comments	Mona Complex. Gwna beds. See Mem.Geol.of Anglesey.pp.378-9 Variolitic. Porphyritic albite & pseudomorphs after augite
Locality details	Newborough sand, W.side w.greenstone
50k map sheet	Caernarfon (105) View images in GeoScenic related to 'Caernarfon' View the geology near 'Caernarfon'
Map reference	SH 41 66
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.