BGS mineralogy and petrology collection record

Sample number	E10615; COLLNO16;
Sample Donor	Blake,Professor
Rock name	'Original entry: Dolomite (Siliceous)'
Stratigraphy	Not entered
Comments	Palaeozoic Metasomatism. See Mem.Geol.of Anglesey.pp.572-4: c.f. E.10481. Carbonates, quartz, pyrite, chlorite.
Locality details	Porth-y-Defaid
50k map sheet	Holyhead (93) View images in GeoScenic related to 'Holyhead' View the geology near 'Holyhead'
Map reference	SH 289 857
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.