BGS mineralogy and petrology collection record

Sample number E64014; COLLNOKB1014;
Sample Donor Not entered
Rock name Siltstone (Undifferentiated). 'Original entry: Siltstone'
Stratigraphy Not entered
Comments Up to 2cm bands of acid clasts, 3m below basalt(GROUP= Nantmor Group)(FORM= Cwm Eigiau Fm.)(MEMB= .)(IE=)(TEXTURE=+Py, cp, qz
Locality details Cwm Tregalan
50k map sheet Snowdon (119)

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Map reference SH 6155 5305
Year collected Not entered 
Bore name Not applicable
Confidentiality No restrictions