BGS mineralogy and petrology collection record

Sample number S6717
Sample Donor Harker, Alfred
Rock name 'Original entry: Porphyritic Basalt'
Stratigraphy Not entered
Comments Dyke; has rare quartz grains
Locality details Dyke 0.25 mile N by E of Beinn Suardal
50k map sheet Glenelg (71)

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Map reference NG 633 209
Year collected Not entered 
Bore name Not applicable
Confidentiality No restrictions

Petrological thin sections

Links to high resolution images

Transition from XPL to PPL light


S6717

Cross Polarized, S6717

Plane Polarized, S6717

Plane Polarized, S6717