Intraplate Volcanism
The 5 percent of known volcanoes in the world that are not closely related to plate margins are generally regarded as intraplate, or “hot-spot,” volcanoes. A hot spot is believed to be related to the rising of a deep-mantle plume, which
is caused by very slow convection of highly viscous material in the Earth’s mantle.
is caused by very slow convection of highly viscous material in the Earth’s mantle.
Ring of Fire
The Ring of Fire is an area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. In a 40,000 km (25,000 mi)
horseshoe shape, it is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and/or plate movements. It has 452
volcanoes and is home to over 75% of the world's active and dormant volcanoes. It is
sometimes called the circum-Pacific belt or the circum-Pacific seismic
belt.
horseshoe shape, it is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and/or plate movements. It has 452
volcanoes and is home to over 75% of the world's active and dormant volcanoes. It is
sometimes called the circum-Pacific belt or the circum-Pacific seismic
belt.
Lava
Lava refers both to molten rock expelled by a volcano during an eruption
and the resulting rock after solidification and cooling. This molten rock is
formed in the interior of some planets, including Earth, and some of their
satellites
and the resulting rock after solidification and cooling. This molten rock is
formed in the interior of some planets, including Earth, and some of their
satellites
Magma
Magma is a mixture of molten or semi-molten rock, volatiles and solids
that is found beneath the surface of the Earth, and is expected to exist on
other terrestrial planets.
that is found beneath the surface of the Earth, and is expected to exist on
other terrestrial planets.
Viscosity
The viscosity of a fluid is a measure of its resistance to gradual
deformation by shear stress or tensile stress. For liquids, it corresponds to
the informal notion of "thickness". For example, honey has a higher viscosity
than water
deformation by shear stress or tensile stress. For liquids, it corresponds to
the informal notion of "thickness". For example, honey has a higher viscosity
than water