BGS mineralogy and petrology collection record

Sample number	S52648; COLLNOYR1303;
Sample Donor	Smith,D.I.
Rock name	'Original entry: Porphyrite'
Stratigraphy	Not entered
Comments	Porphyrite dyke
Locality details	Cruachan Main Tunnel, Chainage 13200 ft from outfall portal
50k map sheet	Oban (45) View images in GeoScenic related to 'Oban' View the geology near 'Oban'
Map reference	NN 1043 3195
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.