BGS mineralogy and petrology collection record

Sample number	E41584; COLLNOSN1635;
Sample Donor	Sanderson,R.W.
Rock name	'Original entry: Porphyritic Quartz Andesite (Albitised)'
Stratigraphy	Not entered
Comments	Block from agglomerate. Ordovician
Locality details	Crags below Castle on E side, Montgomery
50k map sheet	Montgomery (165) View images in GeoScenic related to 'Montgomery' View the geology near 'Montgomery'
Map reference	SO 2216 9682
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.