BGS mineralogy and petrology collection record

Sample number	E62899; COLLNOOHR5028;
Sample Donor	Colman, T.B.
Rock name	'Original entry: Silica Rock'
Stratigraphy	Not entered
Comments	Silica rock. Penmynydd Zone
Locality details	Llangaffo Tyn B Pwll. c. 300 m SW of Farm
50k map sheet	Caernarfon (105) View images in GeoScenic related to 'Caernarfon' View the geology near 'Caernarfon'
Map reference	SH 4367 6830
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.