BGS mineralogy and petrology collection record

Sample number	E8457; COLLNO118;
Sample Donor	Calloway, G.A.
Rock name	'Original entry: Pebbly Grit'
Stratigraphy	Not entered
Comments	See Mem.Geol.of Anglesey c.f.p.444 Ordovician. Arenig. Fragments of mona complex. [Tywyn Ridge is crossed out on loose sheet with samples]
Locality details	Ridge S of Chymwr
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 369 858
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.