BGS mineralogy and petrology collection record

Sample number	MR19621
Sample Donor	Woodland,A.W.
Rock name	'Original entry: Pyrolusite'
Stratigraphy	Not entered
Comments	Produced by weathering of manganese ore Lower Cambrian
Locality details	Cwm-mawr 3 1/2ml. ENE of Harlech
50k map sheet	Harlech (135) View images in GeoScenic related to 'Harlech' View the geology near 'Harlech'
Map reference	SH 634 320
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions