BGS mineralogy and petrology collection record

Sample number	E63270; COLLNOKB270;
Sample Donor	Not entered
Rock name	Rhyodacite. 'Original entry: Feldspar Porphyry Composite'
Stratigraphy	Not entered
Comments	20m from contact with dolerite, comp. sill(GROUP= )(FORM= )(MEMB= .)(IE=I)(TEXTURE=Spherulitic, porph
Locality details	Nant Mor/Croesor
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View a geological map near 'Snowdon'
Map reference	SH 6310 4523
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.