BGS mineralogy and petrology collection record

Sample number	E18657; COLLNOWCCR227;
Sample Donor	Rose,W.C.C.
Rock name	'Original entry: Altered Biotite-Porphyrite'
Stratigraphy	Not entered
Comments	QUARTZ PORPHYRY DYKE IN BORR.VOLCANIC.SERIES (dyke up to 50') THICK SPECIMEN PROBABLY FROM MIDDLE OF DYKE CLEAVED; ORIGINALLY MAPPED AS ASH,BUT? ANDESITE see burton memo 1" 140 p 48 C/E 23260
Locality details	LUCY'S TONGUE, 865Y E.15dN. OF 2149 STANG
50k map sheet	Keswick (29) View images in GeoScenic related to 'Keswick' View the geology near 'Keswick'
Map reference	NY 363 178
Year collected	Not entered
Bore name	Not applicable
Confidentiality	No restrictions

Petrological thin sections

Field of view: c. 31 mm.