Warren County has a 3-member Board of County Commissioners that administer and oversee the various County departments, similar to all but 2 of the 88 Ohio counties. The elected commissioners serve four-year terms.
Except for the liquid outer core, most of the Earth takes the form of a rheid, a form of solid that can move or deform under pressure. Magma, as liquid, preferentially forms in high temperature, low pressure environments within several kilometers of the Earth's surface.agma also contains gases, which expand as the magma rises. Magma that is high in silica resists flowing, so expanding gases are trapped in it. Pressure builds up until the gases blast out in a violent, dangerous explosion.
Most magma that reaches the surface in volcanic eruptions comes from a part of Earth's mantle called the asthenosphere. The asthenosphere is a layer of solid rock that is near its melting point.Turning this solid rock into liquid magma means changing its temperature, pressure, and water content. Try your hand at melting rock to create magma. The first thing to try changing is the temperature.Your rock is a toasty 1,500 degrees Celsius, but it's still solid. Click on the words lower or raise to change the temperature your rock is subjected to inside Earth.ry your hand at melting rock to create magma. The first thing to try changing is the temperature. Your rock is a toasty 1,500 degrees Celsius, but it's still solid. Click on the words lower or raise to change the temperature your rock is subjected to inside Earth.