BGS mineralogy and petrology collection record

Sample number E52476; COLLNOMH904;
Sample Donor Howells,M.F.
Rock name Not entered
Stratigraphy Not entered
Comments Silicious tuff or Rhyolite? Caradoc, Ordovician.
Locality details CWM Glas_Mawr, N of Crib y Ddysgl
50k map sheet Bangor (106)

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Map reference SH 6193 5598
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


E52476

Cross Polarized, E52476

Plane Polarized, E52476

Plane Polarized, E52476