BGS mineralogy and petrology collection record

Sample number	E6431; COLLNO10;
Sample Donor	Flett,J.S.
Rock name	'Original entry: Chert (Nuradislaria)'
Stratigraphy	Not entered
Comments	Mona Complex. Gwna Beds. See Anglesey Memoir.pp.378-9.
Locality details	3/4m.NNE.of Isthmus of Llandwyn Is.
50k map sheet	Caernarfon (105) View images in GeoScenic related to 'Caernarfon' View the geology near 'Caernarfon'
Map reference	SH 392 647
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.