BGS mineralogy and petrology collection record

Sample number	E20857; COLLNORB1758;
Sample Donor	Road Research Laboratory
Rock name	Trachytic-Rock. 'Original entry: Quartz Keratophyre'
Stratigraphy	Not entered
Comments	Not entered
Locality details	Llanelwedd Qry. 1 ml NE of Builth Wells
50k map sheet	Builth (196) View images in GeoScenic related to 'Builth' View a geological map near 'Builth'
Map reference
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.