BGS mineralogy and petrology collection record

Sample number	RC377/4; M6925/1; TS970;
Sample Donor	Not entered
Rock name	'Original entry: Xenolith In Kimberlite'
Stratigraphy	Not entered
Comments	A biotite-adamellite with a cavernous appearance due to removal of quartz. Large phenocrysts occur of fresh microcline perthite and altered plagoiclase.
Locality details	Drill Hole 3, 585 ft down, Koidu
50k map sheet	Not entered
Map reference	Not entered
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions