Subject ASC00014ma
The Quarterly journal of the Geological Society of London.
v.47 (1891), Page 301 (1891)
Smithsonian Libraries
BHL Page 36628381
Keywords
Chemicals spherulitie rhyolite rocks north wales ordovician lavas chemical composition metamorhic chart chemistry specific gravity geology rhyolites rocks Rhyolites chemical composition great yarlside north wales petrology Caernarvonshire Bala Volcanic Series