BGS mineralogy and petrology collection record

Sample number E21807
Sample Donor Shannon,W.G.
Rock name Trachyte. 'Original entry: Orthophyre'
Stratigraphy Not entered
Comments Not entered
Locality details Knowle, Spencecombe
50k map sheet Exeter (325)

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Map reference SS 790 023
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, E21807

Plane Polarized, E21807

Plane Polarized, E21807