A two-metre-long painting of a kangaroo in Western Australia's Kimberley region has been identified as Australia's oldest intact rock painting. Using the radiocarbon dating of 27 mud wasp nests, collected from over and under 16 similar paintings, a University of Melbourne collaboration has put the painting at 17, and 17, years old. The Kimberley-based research is part of Australia's largest rock art dating project, led by Professor Andy Gleadow from the University of Melbourne. Published today in Nature Human Behaviour, Dr Finch and his colleagues detail how rock shelters have preserved the Kimberley galleries of rock paintings, many of them painted over by younger artists, for millennia -- and how they managed to date the kangaroo rock painting as Australia's oldest known in-situ painting. The kangaroo is painted on the sloping ceiling of a rock shelter on the Unghango clan estate in Balanggarra country, above the Drysdale River in the north-eastern Kimberley region of Western Australia.
Radioactive Dating Game
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Flood geology also creation geology or diluvial geology is the attempt to interpret and reconcile geological features of the Earth in accordance with a literal belief in the global flood described in Genesis 6—8. In the early 19th century, diluvial geologists hypothesized that specific surface features provided evidence of a worldwide flood which had followed earlier geological eras ; after further investigation they agreed that these features resulted from local floods or from glaciers. In the 20th century, young-Earth creationists revived flood geology as an overarching concept in their opposition to evolution , assuming a recent six-day Creation and cataclysmic geological changes during the Biblical Deluge, and incorporating creationist explanations of the sequences of rock strata. In the early stages of development of the science of geology , fossils were interpreted as evidence of past flooding. The "theories of the Earth" of the 17th century proposed mechanisms based on natural laws, within a timescale set by the biblical chronology. As modern geology developed, geologists found evidence of an ancient Earth , and evidence inconsistent with the notion that the Earth had developed in a series of cataclysms, like the Genesis flood.
Relative techniques were developed earlier in the history of archaeology as a profession and are considered less trustworthy than absolute ones. There are several different methods. In stratigraphy , archaeologists assume that sites undergo stratification over time, leaving older layers beneath newer ones. Archaeologists use that assumption, called the law of superposition, to help determine a relative chronology for the site itself.
Dating techniques are procedures used by scientists to determine the age of rocks, fossils, or artifacts. Relative dating methods tell only if one sample is older or younger than another; absolute dating methods provide an approximate date in years. The latter have generally been available only since