BGS mineralogy and petrology collection record

Sample number S18487
Sample Donor Tait,D.
Rock name 'Original entry: Glassy Acid Interior Of Sill, More Devitrified Than S. 18486'
Stratigraphy Not entered
Comments Sapphire-bearing sill; Memoir, p. 273; sheath of sheath portion
Locality details Rubh' a' Chromain, N side of promontory
50k map sheet Mull (44)

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Map reference NM 5237 2031
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


S18487

Cross Polarized, S18487

Plane Polarized, S18487

Plane Polarized, S18487