BGS mineralogy and petrology collection record

Sample number S22246
Sample Donor Richey, James E.
Rock name 'Original entry: Contact-Altered Porphyritic Quartz-Dolerite'
Stratigraphy Not entered
Comments Porphyritic quartz-dolerite cone sheet, baked; Memoir, pp. 191, 237
Locality details 160 yds NW of Kilchoan Free Church
50k map sheet Coll (51)

View images in GeoScenic related to 'Coll'

View the geology near 'Coll'

Map reference NM 4787 6435
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


S22246

Cross Polarized, S22246

Plane Polarized, S22246

Plane Polarized, S22246