BGS mineralogy and petrology collection record

Sample number	E11026; COLLNO107;
Sample Donor	Matley, C.A
Rock name	'Original entry: Gritty Chloritic Mudstone'
Stratigraphy	Not entered
Comments	Mona Complex. Gwna Beds. See Mem.Geol.of Anglesey.p.308. Quartz, chlorite, etc. Almost undeformed. Prob.a volcanic dust. ?Old dyke. Gynfor.
Locality details	Coast at Penrhyn towards Porth-y-Wylfa.
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 365 939
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.