. . . . . . . "MSCI"@en . . . . "Mudstone, siltstone, sandstone, coal, ironstone and ferricrete"@en . . . "stable"@en . . "Mudstone, siltstone, sandstone, coal, ironstone and ferricrete"@en . . "Mudstone, siltstone, sandstone, coal, ironstone and ferricrete"@en .