The oldest
occupation layers on the island date to 6510–5790
cal BP, which shows that Jiigurru was the earliest offshore island occupied on the northern part of the
Great Barrier Reef. of Lizard Island, which was found to contain granite-derived,
quartz sand temper. The midden is quite large, covering a total area of . Site 17 was first observed by Jim Specht in 1978–9, then excavated by Robynne Mills in 1992. The site was further excavated by a team including Specht in 2009, who created a X x trench, and identified six
stratigraphic layers. It was observed through
radiocarbon dating that the
basal layer (6) produced a range of 3358–2929 cal BP on charcoal found at the depth. In October 2009 Lentfer, Specht, and a representative of the Dingaal people, Johnathan Charlie, began excavating a new trench east of Mills trench. This new trench was x x , and showed six layers of stratigraphy similar to Mills trench. There were recovered pieces of quartz, granite, and
pumice discovered from the basal levels of layer number 6, which using radiocarbon dating were dated to be from 3815 to 3571 cal BP to 3206–2959 cal BP.
Mangrove Beach In 2006, New Zealand archaeologist Matthew Felgate found pottery in an
intertidal zone by chance when he was on holiday on the island, on Mangrove Beach. This was the first pottery found, and was reported in a 2010 study by Felgate; however, it could not be reliably dated at that time. including Kenneth McLean, chair of Walmbaar Aboriginal Corporation, and other members of the Dingaal and Ngurrumungu communities, Co-author Quan Hua of
ANSTO is an expert in radiocarbon dating. There is conclusive evidence that the pottery is not of Lapita origin, and it is also proof of continuous seasonal occupation of the island by Aboriginal people. It is not known by newer sherds were not found on that site, and further research is necessary. There has been a paucity of research done on the eastern side of Cape York Peninsula. ==Governance==