BGS mineralogy and petrology collection record

Sample number	E28815; MR22018; COLLNOC766;
Sample Donor	Collins,G.H.
Rock name	'Original entry: Rhyolite'
Stratigraphy	Not entered
Comments	Riebeckite rhyolite; chilled edge of granite intrusion
Locality details	Rock Knoll on Mynytho Common. 500 yds N 40 deg W of school.
50k map sheet	Pwllheli (134) View images in GeoScenic related to 'Pwllheli' View the geology near 'Pwllheli'
Map reference	SH 299 314
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions