BGS mineralogy and petrology collection record

Sample number	E49937; COLLNOLA589;
Sample Donor	Allen,P.M.
Rock name	'Original entry: Porphyritic Volcanic Rock'
Stratigraphy	Not entered
Comments	Feldspar porphyry
Locality details	320 yds 100 deg from Bryn Teg
50k map sheet	Harlech (135) View images in GeoScenic related to 'Harlech' View the geology near 'Harlech'
Map reference	SH 7048 3214
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.