Subject ASC0003ua5
The geologist : a popular monthly magazine of geology.
Vol.1, Page 146 ()
Natural History Museum Library, London
BHL Page 46420144
Keywords
map plain thingvalla lake lava plateau river oxeraa almanna gja rabna gja volcanic rocks geysirs Iceland Thingvalla Almanna Gja Main Gja Rabna Gja Hrafna Gja Ravens’s Gja topography landscape pathways compass