BGS mineralogy and petrology collection record

Sample number E62049; COLLNOGW87;
Sample Donor Woodhall, D.G.
Rock name Semipelite.
Stratigraphy Not entered
Comments Field name: Tuff. Thin Section--strongly chloritised & sericitised quartzo-feldspathic rock, no obvious igneous textures
Locality details 675 m 251 deg from Bryn Brith; 5.4 Km NE of Fairbourne Stn.
50k map sheet Barmouth (149)

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Map reference SH 6582 1513
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


E62049

Cross Polarized, E62049

Plane Polarized, E62049

Plane Polarized, E62049