BGS mineralogy and petrology collection record

Sample number	E10807; COLLNO208;
Sample Donor	Blake,Professor
Rock name	'Original entry: Tuff. Lowest Grit. See Note On Loose Leaf Register Sheet 106 For This.'
Stratigraphy	Not entered
Comments	Barron Hill Rocks. See Mem.Geol.of Anglesey.p.390. Felsite andesite tuff
Locality details	Intrusive calc., Gwladys
50k map sheet	Caernarfon (105) View images in GeoScenic related to 'Caernarfon' View the geology near 'Caernarfon'
Map reference	SH 40 65
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.