BGS mineralogy and petrology collection record

Sample number S55470; COLLNOYC2325;
Sample Donor Mykura,W.
Rock name 'Original entry: Sparsely Porphyritic Trachyte'
Stratigraphy Not entered
Comments Dyke of fine-grained ?carbonatite close to vent margin cutting sediment, Vol. LV, p. 561
Locality details Bressay, E shore, 740 yds S 10 deg W of broch on W shore of Noss
50k map sheet West Shetland and South Shetland ? (126)

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Map reference HU 527 403
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


S55470

Cross Polarized, S55470

Plane Polarized, S55470

Plane Polarized, S55470