BGS mineralogy and petrology collection record

Sample number E10635; COLLNO36;
Sample Donor Blake,Professor
Rock name 'Original entry: Silicified Gneiss'
Stratigraphy Not entered
Comments see mem.geology of Anglesey Yr 1919 cf p 569-570 cf E10350-1 Variable mosaic of Quartz with traces of the Gnessic foliation
Locality details Pen bryn-yr-Eglwys
50k map sheet Holyhead (93)

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Map reference SH 294 924
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


E10635

Cross Polarized, E10635

Plane Polarized, E10635

Plane Polarized, E10635