astronomic determinations

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Radiocarbon dating — (sometimes simply known as carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon 14 (14C) to estimate the age of carbon bearing materials up to about 58,000 to 62,000 years.[1] Raw, i.e. uncalibrated … Wikipedia
laplace station — noun Usage: usually capitalized L : a geodetic station at which coincident triangulation and astronomic longitude and azimuth determinations are made … Useful english dictionary

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