BGS mineralogy and petrology collection record

Sample number	S30395; COLLNOTR155;
Sample Donor	Robertson,T.
Rock name	'Original entry: Quartz-Feldspar-Biotite Granulite, Chloritised'
Stratigraphy	Not entered
Comments	At contact of granite with calcareous beds; turbid feldspar with polysynthetic twinning
Locality details	S5. W side of North Mouth 880 yds NNE of church, Out Skerries
50k map sheet	Central Shetland (128) View images in GeoScenic related to 'Central Shetland' View the geology near 'Central Shetland'
Map reference	HU 684 724
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.