BGS mineralogy and petrology collection record

Sample number	E20833; COLLNORB1753;
Sample Donor	Road Research Laboratory
Rock name	'Original entry: Quartzite'
Stratigraphy	Not entered
Comments	see burton memoir 1" in 140 p 45 See also PET VOL XXIX p281
Locality details	Winford quarry Ridgehill
50k map sheet	Bristol (264) View images in GeoScenic related to 'Bristol' View the geology near 'Bristol'
Map reference	ST 540 625
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.