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The rewards from resolving the tempo of magmatic, paleobiologic, paleoclimatic, and tectonic processes at better than the per mil level of precision have spurred a quest within the geochronology community to improve the precision, accuracy, and calibration of several chronometers, including the 40Ar/39Ar variant of the K-Ar clock. A new generation of multi-collector mass spectrometers for 40Ar/39Ar...
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