BGS mineralogy and petrology collection record

Sample number E19777; MR17636; COLLNOAWW29;
Sample Donor Woodland,A.W.
Rock name Siltstone (Undifferentiated). 'Original entry: Siltstone With Chlorite, Pyrite Spots.'
Stratigraphy Not entered
Comments Siltstone associated with specimen E 19776, with pyrite concretions.
Locality details Old open trial workings for Ironstone, near cliffs, half a mile N.by W. of Trevor village; N. of Yr Eifl.
50k map sheet Nefyn (118)

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Map reference SH 371 474
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


E19777

Cross Polarized, E19777

Plane Polarized, E19777

Plane Polarized, E19777