A large insitu anvil/grinding stone in an area interpreted by archaeologists as a metallurgical workshop. It is associated with several smaller stones that show signs of use as grinding or hammer stones. On the northwest side of the stone is a partial pottery vessel--unusual for its layered construction (NK 09-787). To the right of the partial pot are two flat iron discs (larger, above, SF 09-370 and smaller, below SF 90-371). The smaller grinding stone (upper left of photo) rested, grinding surface down, on top of a pottery jar (NK 09-788) which was exposed in the next excavation level. Photo scale bar in 5 cm increments. Photo arrow pointing north. Site Ngre Kataa. 4 July 2009.