BGS mineralogy and petrology collection record

Sample number S20721
Sample Donor Anderson, E.M.
Rock name 'Original entry: Quartz-Albite Porphyrite (Sphene In Good Crystals)'
Stratigraphy Not entered
Comments S. 20718-20728 are a set of irregular intrusive sheets, either horizontal or inclined to W or N. S. 20721-20722 are members of a composite sheet, S. 20722 being maerginal and margins of two being abrupt;S. 20723 and S., 20724 are similarly related b
Locality details 200 yds NW from Rubha na Carraig-geire
50k map sheet Iona (43)

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Map reference NM 2646 2159
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


S20721

Cross Polarized, S20721

Plane Polarized, S20721

Plane Polarized, S20721