Subject ASC0003sl7
The geological magazine, or, Monthly journal of geology.
Decade 2:v.1 (1874), Page 453 (1874)
Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
BHL Page 32525778
Keywords
crystals porphyry felsitic felsitic base felsite chlorite calcite pyrites microscopic examination natural size mineral mineral composition geology orthose crystals west galway galway s w mayo mayo ireland Crystal size illustration Galway Mayo