BGS mineralogy and petrology collection record

Sample number S6646
Sample Donor Macconachie,A.
Rock name 'Original entry: Porphyritic Trachyte'
Stratigraphy Not entered
Comments Porphyritic trachyte
Locality details 1.25 miles N of Marchmont House
50k map sheet Kelso (25)

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Map reference NT 740 500
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


S6646

Cross Polarized, S6646

Plane Polarized, S6646

Plane Polarized, S6646