intraplate volcanism Hot spot vulcanism are areas where concentrations of radioactive isotopes have accumulated and have created a magma chamber that forms volcanoes. There are many different hot spot volcanoes, notably the Hawaiian Island/Emperor Seamount chain, the Deccan Traps/Maldives Island hot spot. the Canary Islands hot spot and the Yellowstone Caldera hot spot, just to name a few.
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 hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this
Magma hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed by cooling
Viscosity the state of being thick, sticky, and semifluid in consistency, due to internal friction
Silica Content Define Silica at Dictionary.com. silica. silica. 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