A volcano is an opening in the surface of a planetary mass object such as
the Earth which allows hot lava, volcanic ash, and gases to escape from a magma
chamber below the surface.
the Earth which allows hot lava, volcanic ash, and gases to escape from a magma
chamber below the surface.
INTRAPLATE VOLCANISM. HOT SPOTS AND MANTLE PLUMES. Although
most volcanic rocks are generated at plate boundaries, there are a few
exceptionally active sites of volcanism within the plate interiors. These
intraplate regions of voluminous volcanism are called hotspots.
most volcanic rocks are generated at plate boundaries, there are a few
exceptionally active sites of volcanism within the plate interiors. These
intraplate regions of voluminous volcanism are called hotspots.
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.
The Ring of Fire is an area where a large number of earthquakes and
volcanic eruptions occur in the basin of the Pacific Ocean.
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.
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.
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.
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.
Viscosity
The viscosity of a fluid is a measure of its
resistance to gradual
deformation by shear stress or tensile stress.
The viscosity of a fluid is a measure of its
resistance to gradual
deformation by shear stress or tensile stress.
Silica Content
the dioxide form of silicon, SiO 2 , occurring especially as quartz sand, flint,
and agate: used usually in the form of its prepared white powder chiefly in the
manufacture of glass, water glass, ceramics, and abrasives.
the dioxide form of silicon, SiO 2 , occurring especially as quartz sand, flint,
and agate: used usually in the form of its prepared white powder chiefly in the
manufacture of glass, water glass, ceramics, and abrasives.