BGS mineralogy and petrology collection record

Sample number E10680; COLLNO81;
Sample Donor Blake,Professor
Rock name 'Original entry: Micaceous Gneiss'
Stratigraphy Not entered
Comments Quartz, Albite, Biotite and large well developed White Micas Palaeozoic ? The Gneisses
Locality details Location not identified but possibly near Hen-Blas Gors Mill S. of Llanerchuymedd
50k map sheet Holyhead (93)

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Map reference SH 426 838
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


E10680

Cross Polarized, E10680

Plane Polarized, E10680

Plane Polarized, E10680