BGS mineralogy and petrology collection record

Sample number	MR6581
Sample Donor	Not entered
Rock name	'Original entry: Porphyrite, Altered Andesite.'
Stratigraphy	Not entered
Comments	189/4, Q/168
Locality details	Gaer-fawr, Carneddau, nr. Builth, Breconshire
50k map sheet	Builth (196) View images in GeoScenic related to 'Builth' View the geology near 'Builth'
Map reference	SO 058 531
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions