BGS mineralogy and petrology collection record

Sample number MR22480
Sample Donor Chaperlin,K.
Rock name 'Original entry: Porphyritic Diabase'
Stratigraphy Not entered
Comments Porphyritic Diabase. NGR as in register. Harker "Bala Volcanics", Pg 46, Fig 163
Locality details Quarry name: not recorded: at Yoke House Qry. (Disused), 800 yd ENE of Yoke House Caernarvonshire
50k map sheet Pwllheli (134)

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Map reference SH 386 372
Year collected 1959 
Bore name Not applicable
Confidentiality No restrictions