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Paleopocalypse! Ancient Relic Points to a Turning Point in Earth’s History 42,000 Years Ago
Earth’s magnetic field broke down 42, years ago and caused massive sudden climate change
Research focused upon the causes, timing, duration, geographic extent and impact on hunter-gatherer groups of this important cooling episode, has been hampered by inconsistencies in radiocarbon, ice core and varve time scales. The Younger Dryas cold event, represents an abrupt Northern Hemisphere cooling episode, punctuating the general warming trend from the Last Glacial Maximum LGM; 22, years ago to the Holocene 11, years ago. The timing of cooling leading into the YD and its duration are still incompletely understood. These chronological discrepancies undermine the calibration of all Lateglacial 14 C dates and are hindering determination of the synchronicity of climate change between regions and archives, which is urgently needed to help elucidate the mechanisms of abrupt global climate change. The Northland sub-fossil kauri resource represents one of the world's foremost archives of atmospheric records during the last 60, yrs. Kauri logs are buried in bogs scattered over a km stretch of northern New Zealand, with the acid conditions resulting in a remarkable state of preservation of the wood. Some of the buried trees are of enormous proportions, with diameters greater than 4 m and individual ages of more than 2, yr.
Foto desnuda de Veena Malik Turismo en Ecuador
The radiocarbon ages indicated here are not directly equivalent to calender years. Lab No. The laboratory number is a unique identifier given to each radiocarbon sample. The prefix identifies the laboratory that processed the sample. The 'Wk' prefix shown here indicates that these samples were processed at the University of Waikato Radiocarbon Dating Laboratory.
Field : Radiocarbon dating. Currently, her research is focused on the dating of bone and shell from sites in New Zealand and the Pacific, specifically marine reservoir collections and the influence of diet on human bone C Recent excavations of the Wairau Bar archaeological site in Blenheim have revealed ancient moa bone fragments, marine shells and charcoal from fires. The lab is currently dating samples of these finds.