diamond bearing neoarchean metaconglomerates are present in the michipicoten greenstone belt, wawa-abitibi subprovince near wawa, ontario. they form a portion of the dore metasedimentary rocks in the arliss lake subbasin, and unconformably overlie a succession of mafic metabasalts. the conglomerates are transitional into argillite which in turn is conformably overlain by metabasalts. the conglomeratic succession has a maximum thickness of 454 meters and confined to what appears to be a deformed paleovalley at the base of the sedimentary succession.