BGS mineralogy and petrology collection record

Sample number S14688
Sample Donor Wright, William Bourke (only Wright in Survey before 1935, prob. same as H B Wright above)
Rock name 'Original entry: ?Altered Acid Tuff'
Stratigraphy Not entered
Comments Mapped as part of Rhyolite Lava Group (belonging to Breccia Group); Memoir, p. 208
Locality details 0.625 mile NW of trig pt 1493 ft Beinn Duatharach
50k map sheet Mull (44)

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Map reference NM 5956 3707
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


S14688

Cross Polarized, S14688

Plane Polarized, S14688

Plane Polarized, S14688