BGS mineralogy and petrology collection record

Sample number E10676; COLLNO77;
Sample Donor Blake,Professor
Rock name 'Original entry: Mica-Schist. Grey Gneiss.'
Stratigraphy Not entered
Comments Mona Complex. Pen-Zone. See Mem.Geol.of Anglesey.p.340. Quartz, feldspar, mica's. Texture irregular & unusual
Locality details Llangywyfan
50k map sheet Caernarfon (105)

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Map reference SH 339 708
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


E10676

Cross Polarized, E10676

Plane Polarized, E10676

Plane Polarized, E10676