McDonald Islands (volcano) McDonald Islands (volcano) The McDonald Islands () are the peaks of a volcano in the southern Indian Ocean in the vicinity of Heard Island (). The islands are Australian external territory. Prior to 1992, the volcano had not erupted in the previous 75,000 years. The McDonald Islands volcano comprises three islands: McDonald Island, Flat Island (which later merged with McDonald Island) and Meyer Rock. The islands are mostly composed of phonolitic low-silica pumice, dikes and lava domes, and sit atop a submarine plateau, the Kerguelen plateau. They are located about 75 km from Heard Island. McDonald Island is the largest
Volcano tectonics understood within the framework of a reasonable model or theory of volcano behaviour. Quantitative and testable models must, in the end, be related to some physical theories and thus to physics. In Volcano-Tectonics, like in solid-earth geophysics in general, the main physical theories used are those that derive from continuum mechanics. For solid-earth sciences, these are mainly solid mechanics, including rock mechanics, fracture mechanics and general tectonophysics, and fluid mechanics, including fluid transport in rock fractures. Volcano tectonics Volcano tectonics is a scientific field that uses the techniques and methods of structural geology, tectonics, and physics to analyse and interpret