URL https://www.researchgate.net/profile/Yoshinari-Abe-3/publication/319474595/figure/fig6/AS:668802777882631@1536466416821/Geological-map-of-the-Hokkaido-region-1-Volcanic-rocks-2-Felsic-plutonic-rocks-3_Q640.jpg
URL2 https://www.researchgate.net/figure/Geological-map-of-the-Hokkaido-region-1-Volcanic-rocks-2-Felsic-plutonic-rocks-3_fig6_319474595
