地質陰影図（北西→南東、15°）。山頂部南西側に広がる文化溶岩･火砕丘（紫色）は1813年の噴出物。須崎溶岩も新期の火山噴出物であるが、それ以外の富立岳火山（左）やナベダオ火山（右）はより古い山体である。

Topographic relief of Suwanosejima combined with geological map (tilted by 15° from the NW to the SE). The Bunka pyroclastics and lavas (purple-colored) are distributed around from the summit area to the western coast. Both the Tondachidake Volcano (left end) and the Nabedao Volcano (right end) are the oldest volcanic products.