BGS mineralogy and petrology collection record

Sample number	E63272; COLLNOKB272;
Sample Donor	Not entered
Rock name	Rhyodacite. 'Original entry: Feldspar Porphyry Composite'
Stratigraphy	Not entered
Comments	15cm from contact with mudstone, no dolerite margin(GROUP= )(FORM= )(MEMB= .)(IE=I)(TEXTURE=Fine-grained
Locality details	Nant Mor/Croesor
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View the geology near 'Snowdon'
Map reference	SH 6314 4510
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.