BGS mineralogy and petrology collection record

Sample number E54270; E54270/A; E54270/B; COLLNOFU64;
Sample Donor Fletcher, Chris J.N
Rock name 'Original entry: Coarse Sandstone'
Stratigraphy Not entered
Comments Grit layer within the Cilgwyn conglomerate.
Locality details 50 m. at 275 deg. from summit of Mynydd Cilgwyn.
50k map sheet Nefyn (118)

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Map reference SH 4971 5430
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


E54270/A

Cross Polarized, E54270/A

Plane Polarized, E54270/A

Plane Polarized, E54270/A


E54270/B

Cross Polarized, E54270/B

Plane Polarized, E54270/B

Plane Polarized, E54270/B