Geological Maps of Volcanoes

For your cartographic titillation, here are some teeny-tiny geological maps of volcanoes in Japan. All those magmatic parameciums fossilized in mid-slither must be quite exhilarating to see at higher resolutions (maybe not unlike these astrogeological surveys?), but unfortunately, to get the full-blown graphic thrill, you'll have to purchase them from the Geological Survey of Japan.