Subject ASC0003vwh
The geologist : a popular monthly magazine of geology.
Vol.4 (1861), Page 283 (1861)
Natural History Museum Library, London
BHL Page 46206965
Keywords
line of strike Koperberg Rubidge-on metalliferous saddles metal saddle arrow koperberg line direction axis rock dip axes Koperberg line of strike metalliferous saddles mettalic axis rocks