BGS mineralogy and petrology collection record

Sample number E39581; E39581/A; E39581/B; COLLNOMH271;
Sample Donor Howells,M.F.
Rock name Not entered
Stratigraphy Not entered
Comments Intrusive
Locality details Marian Rhaiade Fawr
50k map sheet Bangor (106)

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Map reference SH 6740 7007
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


E39581

Cross Polarized, E39581

Plane Polarized, E39581

Plane Polarized, E39581


E39581/A

Cross Polarized, E39581/A

Plane Polarized, E39581/A

Plane Polarized, E39581/A


E39581/B

Cross Polarized, E39581/B

Plane Polarized, E39581/B

Plane Polarized, E39581/B