Subject ASC0003wv6
The geologist : a popular monthly magazine of geology.
Vol.6-7 (1863-1864), Page 203 (1863-1864)
Natural History Museum Library, London
BHL Page 46202465
Keywords
stratula rocks quartz structures Arroquhar microscopical crystallization metamorphic rock Mr. Sorby Fig. 1.- Stratula passing into larger bands.