BGS mineralogy and petrology collection record

Sample number	E10660; COLLNO61;
Sample Donor	Blake,Professor
Rock name	'Original entry: Folicated Grit [Slaty]'
Stratigraphy	Not entered
Comments	see mem. Geology of Anglesy pp 259-260 Quartz, Albite, Mica etc Blastopsammitic & Encassio-blastoc with large Epiclasts of Gneissic White Mica Palaeozoic South Stack Se
Locality details	Porth Dafarch Holy Isle
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 233 799
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.