BGS mineralogy and petrology collection record

Sample number E22891; COLLNOKY177;
Sample Donor Kellaway,G.A.
Rock name 'Original entry: Oolitic Limestone, Surface Replaced By Gypsum'
Stratigraphy Not entered
Comments Shows effect of tunnel weathering
Locality details Clifton Down Tunnel. Manhole no.10 (w. end of tunnel)
50k map sheet Bristol (264)

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Map reference ST 575 742
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


E22891

Cross Polarized, E22891

Plane Polarized, E22891

Plane Polarized, E22891