BGS mineralogy and petrology collection record

Sample number	E4221; COLLNOHDC102; NEG1581M; NEG182M;
Sample Donor	H.D.C
Rock name	Dolerite (Synonymous With Microgabbro). 'Original entry: Ophitic Diabase'
Stratigraphy	Not entered
Comments	Not entered
Locality details	Moel-y-Guest Qrys. Nr. Portmadoc
50k map sheet	Snowdon (119) View images in GeoScenic related to 'Snowdon' View a geological map near 'Snowdon'
Map reference
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.