BGS mineralogy and petrology collection record

Sample number E1956
Sample Donor Not entered
Rock name Not entered
Stratigraphy Not entered
Comments dolerite [ Porphyritic dolerite ]: tholeiite with intersertal structure. Mesh plagioclase laths. Groundmass much impregnated with carbonates. Augite altered to chloriteand calcite, rods of opaques - see Lamplugh p328
Locality details 200yds SW of Slack Indigo, Douglas Head: a black compact basalt dyke
50k map sheet Isle of Man (46)

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Map reference SC 37931 74012
Year collected Not entered 
Bore name Not applicable
Confidentiality No restrictions