BGS mineralogy and petrology collection record

Sample number S12468
Sample Donor Grabham, G.W.
Rock name 'Original entry: Baked Mica Porphyrite'
Stratigraphy Not entered
Comments Baked ?matrix of qaurtz, alkali feldspar; possibly dacite lava or dyke?
Locality details 90 yds SW of point 430 yds up fifth burn down SE side of Coupall River, Royal Forest
50k map sheet Ben Nevis (53)

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Map reference NN 2064 5419
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


S12468

Cross Polarized, S12468

Plane Polarized, S12468

Plane Polarized, S12468