口絵写真キャプション

　

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１．南東方上空からみた，東岩手火山の馬蹄型カルデラと薬師岳中央火口丘．

1.Yakushi-dake within an amphitheater of East-Iwate volcano, viewed from the southeast.

　

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２．西方上空からみた，西岩手火山の馬蹄型カルデラ（鬼ヶ城カルデラ）と薬師岳中央火口丘．鬼ヶ城カルデラ内には，二重式火口をもつ御苗代中央火口丘，御釜溶岩円頂丘，大地獄谷中央火口丘が存在する．

2.Amphitheater (Onigajyo Caldera) of West-Iwate Volcano and Yakushi-dake central cone, viewed from the west.

　

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３．南西上空からみた，東岩手火山の薬師岳中央火口丘．

3.Yakushi-dake central cone (with Omuro vent of Myokodake) of East-Iwate Volcano, viewed from the southwest.

　

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４．南方上空からみた，薬師岳中央火口丘内の妙高岳御室火口．

4.Omuro-vent of Myoko dake in Yakushi-dake central cone, viewed from the south.

　

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５．薬師岳中央火口丘西縁からみた，鬼ヶ城カルデラと御苗代湖．

5.Onigajyo Caldera and Lake Onawashiro viewed from the western edge of Yakushi-dake central cone.

　

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６．西方上空からみた，鬼ヶ城カルデラ内の大地獄谷火口付近．

6.Oh-jigokudani crater in Onigajyo Caldera viewed from the west.

　

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７．薬師岳中央火口丘西縁からみた，鬼ヶ城カルデラ壁の溶岩流と岩脈．

7.Lava flows and dikes on the Onigajyo Caldera wall, viewed from the western edge of Yakushi-dake central cone.

　

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８．西方上空からみた，1732年噴出の焼走り溶岩流と噴出源の火口列．

8.Yakebashiri lava flow erupted in 1732 and feeder vents, viewed from the west.

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