BGS mineralogy and petrology collection record

Sample number	E24541; COLLNOBN60;
Sample Donor	Bisson,G.
Rock name	'Original entry: Hornblende Plagioclase Rock. (Contact Altered Albite Dolerite)'
Stratigraphy	Not entered
Comments	A second dyke, about 900 Ft. from W. portal.
Locality details	From dump at East end of Prewley Tunnel.
50k map sheet	Okehampton (324) View images in GeoScenic related to 'Okehampton' View the geology near 'Okehampton'
Map reference	SX 553 907
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.