BGS mineralogy and petrology collection record

Sample number MR17988
Sample Donor Not entered
Rock name 'Original entry: Clay Containing Charcoal Fragments'
Stratigraphy Not entered
Comments Twisted and slickensided from centre of a variegated fissure among magnesian limestone on flank of knoll. Presented by Dr.C.T.Trenchman
Locality details 200ft. altitude in Hawthorn Quarries, N of Hawthorn Dene
50k map sheet Durham (27)

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Map reference NZ 435 462
Year collected Not entered 
Bore name Not applicable
Confidentiality No restrictions