BGS mineralogy and petrology collection record

Sample number	E972; MR11647;
Sample Donor	Museum Specimens
Rock name	Felsite. 'Original entry: Quartz Porphyry'
Stratigraphy	Not entered
Comments	Not entered
Locality details	Lower Grenofen Quarry, near Tavistock.
50k map sheet	Dartmoor Forest (338) View images in GeoScenic related to 'Dartmoor Forest' View a geological map near 'Dartmoor Forest'
Map reference	SX 489 710
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.