BGS mineralogy and petrology collection record

Sample number	E28817; COLLNOC768;
Sample Donor	Collins,G.H.
Rock name	'Original entry: Rhyolite'
Stratigraphy	Not entered
Comments	Altered rhyolite from volcanic plug.
Locality details	Cliff below Criccieth Castle.
50k map sheet	Nefyn (118) View images in GeoScenic related to 'Nefyn' View the geology near 'Nefyn'
Map reference	SH 500 387
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.