forensic pathology - the branch of medical science that uses medical knowledge for legal purposes; forensic pathology provided the evidence that convicted the murderer. forensic medicine. medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques.
There are three major groups of rock: Igneous; Sedimentary; Metamorphic. They are all related through a continuous cycle called the rock cycle. Igneous rocks are created by melting and crystallization of molten material called magma. If the magma reaches the surface, the rocks are said to be extrusive. Volcanic lava flows are examples of extrusive igneous rocks.
The answer to how are igneous rocks formed is pretty straight forward: Igneous rocks are called fire rocks and are formed either underground or above ground. Underground, they are formed when magma deep within the Earth becomes trapped in small pockets.xtrusive igneous rocks are formed at the crustâs surface as a result of the partial melting of rocks within the mantle and crust. Extrusive igneous rocks cool and solidify quicker than intrusive igneous rocks and are fine grained.