BGS mineralogy and petrology collection record

Sample number E28016; MR21561;
Sample Donor Collins,G.H.
Rock name 'Original entry: Tuff'
Stratigraphy Ordovician. Ordovician. Lower Rhyolitic Tuff
Comments Welded Tuff. NGR as in register.
Locality details Quarry name: not recorded: at Roadside Qry. 600 yd SE of Pont y Gromlesh, Llanberis Pass Caernarvonshire
50k map sheet Snowdon (119)

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Map reference SH 633 563
Year collected 1958 
Bore name Not applicable
Confidentiality No restrictions