The area of the epicenter comes at the junction of three tectonic plates, and is very active both seismically and volcanically.
42.
The granites formed at depth within a volcanically active mountain range comparable in geologic setting to the Andes chain in South America.
43.
This shallowing forms the limit between the volcanically active Central Volcanic Zone and the magmatically inactive Pampean flat slab region farther south.
44.
While the Pacific states are the most volcanically active areas, extinct volcanoes and lava flows are found throughout most of the West.
45.
With his students, Voight has analyzed pyroclastic flows, volcanically-induced seismicity, volcanic debris avalanches, and volcanic eruption prediction.
46.
A small telescope observing Jupiter and its volcanically active moon, Io, appears to have faltered because of an over-pressurized component.
47.
Most of the islands originated volcanically, with the archipelago dominated by two 12 million year old Miocene volcanoes, subsequently eroded and dissected.
48.
This geological process has, over time, created the Northern Cordilleran Volcanic Province, which is the most volcanically active area in Canada.
49.
The Cascades make up the majority of the North American West Coast volcanoes; they have been volcanically active for about 36 million years.
50.
During the 1980 eruption of Mount St . Helens, lahars ( volcanically-induced mud and debris flows ) swept through its channel.
