BGS mineralogy and petrology collection record

Sample number	E38128; MR31829; COLLNO27;
Sample Donor	Gritstone Project
Rock name	Sandstone (Undifferentiated). 'Original entry: Protoquartzite'
Stratigraphy	Not entered
Comments	Sandstone-(Millstone Grit) Upper Carboniferous. Used as part of 1970's Roadstone Project
Locality details	Rwlchgwyn Quarry, 5 miles WNW. of Wrexham.
50k map sheet	Wrexham (121) View images in GeoScenic related to 'Wrexham' View the geology near 'Wrexham'
Map reference	SJ 258 533
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.