BGS mineralogy and petrology collection record

Sample number	E10327; COLLNO539; NEGM.116;
Sample Donor	Greenly,E.
Rock name	'Original entry: Chert'
Stratigraphy	Not entered
Comments	Carboniferous. Limestone series. See Anglesey Memoir.p.636.
Locality details	Penllech sand. East Quarry
50k map sheet	Llandudno (94) View images in GeoScenic related to 'Llandudno' View the geology near 'Llandudno'
Map reference	SH 526 822
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.