“target date” of human use of the site. Further because coastal sites were common, there was also the likelihood of older drift wood was used for fuel with age already built in. Accordingly, in the early 1990s scientists began a taxonomic identification of wood charcoal based on anatomical characteristics by comparison to a reference collection of known woody plant species for the particular region or island which allowed scientists to refine their samples for testing further. Unfortunately, not all archaeologists working Polynesia had availed themselves of these advances casting doubt in the field of study for a time. Emerging chronological picture for eastern Polynesia Regardless a chronological picture for eastern Polynesia using AMD radiocarbon methods in the 1980s on identified samples started to lend considerable support to the "short chronology" of settlement, whereby the central archipelagoes of Eastern Polynesia did not begin to be colonized until after AD 800 or later. By the early 1990s “chronometric hygiene” radiocarbon dating aka, high-precision radiocarbon dating approach of samples also started to be employed causing further reconsideration of old orthodoxies. Using chronometric hygiene, previous samples from all around Hawai'i were retested. On the lowest calibration of testing the retested samples returned dates of between 1100 and 1200 AD, with some samples from Kaua'i going back to around 1000 AD. By 2010 some of the latest researchers using high-precision radiocarbon dating and more reliable samples established that the period of eastern and northern Polynesian colonization took, in a shorter time frame and much later than. Note from the perspective of Hawaiian settlement are the colonization dates for the Society Islands and the Marquesas, as these two archipelagoes have long been considered to be the immediate source regions for the first Polynesian voyagers to Hawai‘i. Accordingly, the "earliest in the Society Islands A.D. ∼1025–1120, dispersal continued in one major pulse to all remaining islands A.D. ∼1190–1290." Thus this put the settlement of the Hawaiian Islands taking place ∼1219–1266CE. This rapid colonization is believed to account for the "remarkable uniformity of East Polynesia culture, biology and language." Paleo environment evidence Using plant fossils, charcoal deposit particulates and organic samples and high-precision radiocarbon dating there has been evidence of influences from humans sometimes determined to be around 1000 AD in Kaua'i. and as early as 1300 AD in Moloka‘i with main occupation occurring between 1400 and 1650 AD when the population peaked. For further discussion of pre-contact