BGS mineralogy and petrology collection record

Sample number	E10999; COLLNO80;
Sample Donor	Matley, C.A
Rock name	'Original entry: Sodium Felsite'
Stratigraphy	Not entered
Comments	see mem. Geology of Anglesey p 534 c.f. 10634 plate xiii The Mynechdy sill. Silicified and Micacised but remains of Albite & Hornblende Palaeozoic Intrusions
Locality details	SE. Ysguborgader near Pen Bryn-z-Eglwys
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 300 922
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.