In 2010, more jar burials have been recovered as additional trenches were opened. One very distinct jar was the jar found in Trench 13 because of its unique features. It was the only jar from the site which had earthenware as its cover (Paz, et al., 2010). It was oval-shaped and neonate remains were found inside it. Paz, et al. (2010) stated that as of 2010, there are 28 definite jar burials for the Napa site and they are at least a thousand years old.