Congratulations to Gabe Boring for being chosen as Tennessee Titans Mr. Football Kicker of the Year! Purchase your yearbooks early to save! The price from now until January is $55. You can purchase them online at http://www.yearbooksforever.com The library will pre-sell them at the same price in October.
Extrusive igneous rock is formed from the solidification of  lava.   Intrusive igneous rock is formed from the solidification of  magma.
Magma forms when rocks in the mantle melt due to changes in pressure or the addition of water. Although temperatures in the earth's mantle are much hotter than melting temperature, there is not a... Magma forms when rocks in the mantle melt due to changes in pressure or the addition of water.