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 a geological map 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.