Major Mines Projects | Hunter Valley Mine
Oct 09, 2019· The Dalwood Group at the base is composed essentially of marine shales and sandstones with basaltic lavas and sporadic conglomerates. The overlying Greta Coal Measures consist of lenticular beds of conglomerate, shale, lithic sandstone, coal, and, in the Upper Hunter Valley, unusual thicknesses of kaolinite claystone.