BGS mineralogy and petrology collection record

Sample number	E19319; COLLNO188;
Sample Donor	Road Research Laboratory
Rock name	Porphyry. 'Original entry: Granite Porphyry'
Stratigraphy	Not entered
Comments	Not entered
Locality details	Parish Piece Quarry, Hingston Down, Calstock.
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.