Inhomogeneous chemical evolution of the Galactic halo

We find that abundance patterns seen in extremely metal-poor stars with [Fe/H] less than or similar to -2.5 follow those seen in the individual supernova remnants.. This suggests that stars are made from individual supernova events. By incorporation of a sequence of supernova-induced star formation into the earichment; process of heavy elements, we describe the evolution of stellar abundances in the Galactic halo characterized by the inhomogeneous mixing: of chemical compositions in dense shells and the ambient medium. Here we focus on the chemical evolution of r-process elements in the Galactic halo.