Predynastic and First Dynasty Egyptian basalt vessels

"The origin of Predynastic basalt vessels can be placed in northern Egypt based on comparisons with pottery assemblages, artefact distribution patterns, and chemical analysis of the vessels. The Haddadin basalt flow near Cairo is the source for the rock used to manufacture the vessels based on mineral chemical analyses of the artefacts and basalt bedrock samples. This result supports a manufacturing site at or near Predynastic Maadi..."