BGS mineralogy and petrology collection record

Sample number	E25266; COLLNOAA76;
Sample Donor	Archer,A.A.
Rock name	'Original entry: Dolomitised Sheared Tuff'
Stratigraphy	Not entered
Comments	Mudstone? With Porphyritic Quartz?
Locality details	Trecastell Lead Mine, No.6 Level. W. side of 'Horse', N. of shaft on Main Lode
50k map sheet	Bangor (106) View images in GeoScenic related to 'Bangor' View the geology near 'Bangor'
Map reference	SH 763 745
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.