 The interior faces of many sherds and amphora bodies were coated with a blackish substance, reminiscent of Mediterranean wine amphoras that were sealed with a resin to prevent the liquids inside from leaching through the ceramic.One sherd, comprising approximately the lower 15 cm of an amphora, was split vertically down through the toe button.The piece was filled with a solid mass of resin, probably excess that collected in the bottom when the interior of the vessel was being sealed, or perhaps being the transport item itself.