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).
Oceanic crust is made of a rock called basalt, which is darker and more dense than continental crust. You would only have to drill for about 7 km before crossing the Moho and entering the upper mantle. Below the Moho, the mantle extends to the surface of the Earth's outer core-about 2890 km down.hemical composition - 'crust' and 'mantle'. The surface of the Earth is the top of the 'crust' - whether one is under the sea or on land! By and large, the portions of the crust that poke above the sea to form land consist of 'continental crust' .