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 a geological map near 'Tavistock'
Map reference
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.