BGS mineralogy and petrology collection record

Sample number E24090; MR18484; COLLNOBN76;
Sample Donor Bisson,G.
Rock name Tuff. 'Original entry: Keratophyric Crystal Tuff & Quartz Biotite Cordierite Hornfels'
Stratigraphy Not entered
Comments Coarser crystal tuff with shale bands. (Classification due to W.R.Dearman).
Locality details Meldon Quarry, 2 miles SW. of Okehampton. (BR-S.Reg).
50k map sheet Okehampton (324)

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Map reference SX 568 926
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


Cross Polarized, E24090

Plane Polarized, E24090

Plane Polarized, E24090