BGS mineralogy and petrology collection record

Sample number S24240
Sample Donor Richey, James E.
Rock name 'Original entry: Variolitic ?Dolerite'
Stratigraphy Not entered
Comments Variolitic rock with well-developed prismatic jointing. Prisms almost flat, which grade downwards into normal Ben Hiant dolerite with vertical jointing about 40 ft . Vertical between S. 24235 and S. 24240
Locality details Scarp in gully 0.25 mile + 127 yds W 22 deg S of summit of Ben Hiant
50k map sheet Tobermory (52)

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Map reference NM 531 630
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


S24240

Cross Polarized, S24240

Plane Polarized, S24240

Plane Polarized, S24240