BGS mineralogy and petrology collection record

Sample number	E11030; COLLNO111;
Sample Donor	Matley, C.A
Rock name	'Original entry: Felsite & Basalt.'
Stratigraphy	Not entered
Comments	Palaeozoic Intrusions. See Mem.Geol.of Anglesey. c.f.11804-6: p.528.fig.260. S?..?of dolerite cutting. Sodium-felsite, c.f.E.11804-6. Composite dyke. Intrusion into Granphyre.
Locality details	West of Llanfechell.
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 367 913
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.