BGS mineralogy and petrology collection record

Sample number	S23378; COLLNOL393;
Sample Donor	Macgregor,A.G.
Rock name	'Original entry: Acid Porphyrite (Goup 1) Altered Agm'
Stratigraphy	Not entered
Comments	5 ft NNW porphyrite dyke of S. 23377 altered along joint fissure
Locality details	Quarry beside Horn Burn, 635 yds S 25 deg E from Loudonhill Station
50k map sheet	Kilmarnock (22) View images in GeoScenic related to 'Kilmarnock' View the geology near 'Kilmarnock'
Map reference	NS 6047 3666
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.