| 1：ルルイ火山の噴気地帯、2：爺爺火山の火砕物、3：側火口、4：爺爺火山の古い山体、5：ルルイ火山の山体、6：岩山火山の山体、7：基盤。図の上が北東。 |
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| Gorshkov, G.S. (1970) Volcanism and the upper mantle: investigations in the Kurile Island Arc. Plenum Press, New York-London, Fig.71 | ||
| Geomorphological map of Iwa-yama (Smirnov) and Chacha-dake area. 1: Fumarole field of Rurui Volcano; 2: pyroclastic deposit of Chacha-dake Volcano; 3: subsidiary craters; 4: remnants of the old volcanic structure of Chacha; 5: Rurui Volcano massif; 6: Iwa-yama (Smirnov) Volcano massif; 7: basement. |