5 A Day: Fruit of the Month: Persimmons. Persimmons origins go back to ancient China. Fate intervened in the 1880's when a United States Commander brought back a native Japanese persimmon variety to Washington, D.C. Now, persimmons are grown in California where hundreds of different varieties flourish. A Day: Fruit of the Month: Persimmons. Persimmons origins go back to ancient China. Fate intervened in the 1880's when a United States Commander brought back a native Japanese persimmon variety to Washington, D.C. Now, persimmons are grown in California where hundreds of different varieties flourish.
As the super hot magma cools, it solidifies to form a rock and that rock is called igneous rock. When most people think of igneous rock they vision a volcano erupting pumice and lava. Igneous rocks form directly by crystallization from materials from a magma melt.
Lava flow during a rift eruption at Krafla, Iceland in 1984. Lava is the 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. The source of the heat that melts the rock within the earth is geothermal energy. When first erupted from a volcanic vent, lava is a liquid at temperatures from 700 to 1,200 Â°C (1,292 to 2,192 Â°F). Up to 100,000 times as viscous as water, lava can flow great distances before cooling and solidifying because of its thixotropic and shear thinning properties.