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Igneous or magmatic rocks The most primitive rock type forms when magma (molten rock) solidifies - either inside the earth (plutonic rocks) or during volcanic eruptions (volcanic rocks). A short overview.
Tours by destination We travel to volcanic areas worldwide: from Greece and Italy, Iceland, to Hawai'i, Japan, Indonesia, Vanuatu. We even offer a Round-The-World tour to volcanoes.
Intraplate volcanism A third tectonic setting where volcanism occurs is believed to be the result of mantle plumes and not directly related to plate boundaries. So called hot spot volcanoes fall into this category.