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.
Volcanic rocks are rocks formed when lava cools and solidifies on the earth's surface. Volcanic rocks are also known as 'extrusive igneous rocks' because they form from the 'extrusion,' or eruption, of lava from a volcano.his differentiation between magma and lava is important when we consider the two classifications of igneous rock. This is because plutonic rocks are rocks formed when magma cools and solidifies below the earth's surface, and volcanic rocks are rocks formed when lava cools and solidifies on the earth's surface.