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on old lava flows surrounded by sand. We discovered a rule of thumb: wherever the seafloor is sand rather than coral, ground temperatures are relatively high. Wherever the high heat flow from the cooling
Section: FB5
recovered samples and the acquired geophysical data will be used to decide whether the Marion Rise rather formed from isostatic upwelling of ancient residual mantle material or from excess melting during [...] years and is considered presently dormant. Its composition is strange for a volcano this size and rather resembles that of very small volcanic fields. A multidisciplinary and multinational approach in which