Astrochronology is the dating of sedimentary units by calibration with astronomically tuned timescales, such as Milankovic cycles, or even sunspot cycles. When used in concert with radiometric dating, it allows the resolution of timescales to a high degree of accuracy. If orbital precession cycles are identified, the dating error can be as low as 21,000 years.
- W. Krijgsman; A. R. Fortuinb; F. J. Hilgen; F. J. Sierrod (2001). "Astrochronology for the Messinian Sorbas basin (SE Spain) and orbital (precessional) forcing for evaporite cyclicity". Sedimentary Geology. 140: 43. Bibcode:2001SedG..140...43K. doi:10.1016/S0037-0738(00)00171-8.
- Meyers, S.R. (2008). "Resolving Milankovitchian controversies: The Triassic Latemar Limestone and the Eocene Green River Formation". Geology. 36 (4): 319–322. Bibcode:2008Geo....36..319M. doi:10.1130/G24423A.1.
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