The temperature of some non-volcanic hot springs (such as Arima-Onsen Hot Spring, Yunomine-Onsen Hot Spring and Matsunoyama-Onsen Hot Spring) is extremely high to the extent that the geothermal gradient alone cannot explain. |
非火山性温泉の中には通常の地温勾配では説明できない高温のものがある(有馬温泉・湯の峰温泉・松之山温泉など)。 |