BGS mineralogy and petrology collection record

Sample number	E4218; COLLNO97; NEGM179;
Sample Donor	H.D.C
Rock name	'Original entry: Quartz Porphyrite'
Stratigraphy	Not entered
Comments	Hornsey Macadam.
Locality details	1 mile E. of Tavistock.
50k map sheet	Tavistock (337) View images in GeoScenic related to 'Tavistock' View the geology near 'Tavistock'
Map reference
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.