BGS mineralogy and petrology collection record

Sample number	E8521; COLLNO498;
Sample Donor	Calloway, G.A.
Rock name	'Original entry: Calc.Silic.Mica-Schist'
Stratigraphy	Not entered
Comments	See Mem.Geol.of Anglesey. 1919,cf.p.341.
Locality details	Porth-Tre-Castell. Must be on the SE.side
50k map sheet	Caernarfon (105) View images in GeoScenic related to 'Caernarfon' View the geology near 'Caernarfon'
Map reference	SH 332 706
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.