BGS mineralogy and petrology collection record

Sample number S12503
Sample Donor Grabham, G.W.
Rock name 'Original entry: Tonalite'
Stratigraphy Not entered
Comments ?Marginal modification of granite or Fault Intrusion; Memoir, Sh. 53, p. 164; Memoir, Sh. 54, p. 75
Locality details 920 yds up Coupall River from mouth, Royal Forest
50k map sheet Ben Nevis (53)

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Map reference NN 2408 5503
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


S12503

Cross Polarized, S12503

Plane Polarized, S12503

Plane Polarized, S12503