BGS mineralogy and petrology collection record

Sample number S20774
Sample Donor Bailey, E.B.
Rock name 'Original entry: Tholeiitic Olivine-Bassalt'
Stratigraphy Not entered
Comments Staffa type; cf. S. 20772 and Giant's Causeway; Memoir, p. 145
Locality details Halfway up basal Columnar Group, SE of Aird na h-Iolaire
50k map sheet Iona (43)

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Map reference NM 4054 2847
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


S20774

Cross Polarized, S20774

Plane Polarized, S20774

Plane Polarized, S20774