About County Line Medical Associates County Line Medical Associates is a group practice with 1 location. Currently, County Line Medical Associates specializes in Internal Medicine with 1 physician. County Line Medical Associates Office Locations County Line Medical Associates
Best Answer: The Earth is made up of plates(continental or oceanic) that move becuase of the convection currents that occur in the mantle. As this plates move they drift apart(when crust is formed), collide(crust is destroyed) or pass by each other(causes friction generating faults or earthquaques).
The surface of the rock melts and the air around it incandesces. As a result of this brief but intense heating, the surface burns and forms a thin, dark rind called fusion crust. Meteorites literally began to burn up in our atmosphere, so they tend to appear darker than the terrestrial rocks around them.