BGS mineralogy and petrology collection record

Sample number E41720; COLLNORC1059;
Sample Donor Cave,R.
Rock name 'Original entry: Greywacke Semischist'
Stratigraphy Not entered
Comments 1" Sandstone at top of L lland Persculptus Mst.
Locality details Trackside exposure, 790 yds at 157 deg from Cefnmaesmawr, Machynlleth
50k map sheet Aberystwyth (163)

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Map reference SN 7244 9767
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


E41720

Cross Polarized, E41720

Plane Polarized, E41720

Plane Polarized, E41720