Subject ASC00011yv
The Quarterly journal of the Geological Society of London.
v.67 (1911), Page 466 (1845)
Smithsonian Libraries
BHL Page 39749368
Keywords
quartz stone guaterd analcite ground-mass augite-prisms apatite-needles iron-ore biotite allotriomorphic analcite ocellus steam-cavity sub-idiomorphic analcite carbonate-rhombs chlorite augite-phenocryst gem rock old red sandstone Monmouthshire