BGS mineralogy and petrology collection record

Sample number S20719
Sample Donor Anderson, E.M.
Rock name 'Original entry: Hornblende Porphyrite (Apatite In Small Needles)'
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
Locality details 500 yds WSW from cairn, Dun Cul Bhuirg
50k map sheet Iona (43)

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View the geology near 'Iona'

Map reference NM 2606 2449
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


S20719

Cross Polarized, S20719

Plane Polarized, S20719

Plane Polarized, S20719