The carbonaceous black-shale strata of various ages that exist in different regions of the earth sometimes host large ore bodies, and are the subject of intense scrutiny. The widespread occurrence of black shales in Mongolia ...

The Zerkaly chondritic meteorite belongs to the high-Fe (olivine-bronzite) type H5, with a severely limonitized matrix. Like chondrules, the matrix is characterized by nonuniform texture. The meteorite underwent secondary ...