BGS mineralogy and petrology collection record

Sample number S46965; S46965/A; COLLNOYZ64;
Sample Donor Berridge,N.G.
Rock name 'Original entry: Felsite'
Stratigraphy Not entered
Comments Branching dyke: coarse core of intrusion
Locality details Nant Low Pressure Tunnel (HE 26), 1733 ft from intake portal
50k map sheet Oban (45)

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Map reference NN 0030 2293
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


S46965

Cross Polarized, S46965

Plane Polarized, S46965

Plane Polarized, S46965


S46965/A

Cross Polarized, S46965/A

Plane Polarized, S46965/A

Plane Polarized, S46965/A