BGS mineralogy and petrology collection record

Sample number	E30377; COLLNOC1130;
Sample Donor	Collins,G.H.
Rock name	Not entered
Stratigraphy	Not entered
Comments	Altered dolerite.
Locality details	Tancreston Quarry, 100 Yds. W. at 2 deg. N. of bridge at Tancreston.
50k map sheet	St. Davids (209) View images in GeoScenic related to 'St. Davids' View the geology near 'St. Davids'
Map reference	SM 885 263
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.