| 词条 | Astrochronology |
| 释义 |
Astrochronology is the dating of sedimentary units by calibration with astronomically tuned timescales, such as Milankovic cycles,[1][2] 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. References1. ^{{cite journal | title = Astrochronology for the Messinian Sorbas basin (SE Spain) and orbital (precessional) forcing for evaporite cyclicity | year = 2001 | doi = 10.1016/S0037-0738(00)00171-8 |author1=W. Krijgsman |author2=A. R. Fortuinb |author3=F. J. Hilgen |author4=F. J. Sierrod | journal = Sedimentary Geology | volume = 140 | pages = 43 | bibcode=2001SedG..140...43K}} {{geochronology-stub}}2. ^{{cite journal | author = Meyers, S.R. | year = 2008 | title = Resolving Milankovitchian controversies: The Triassic Latemar Limestone and the Eocene Green River Formation | journal = Geology | volume = 36 | issue = 4 | pages = 319–322 | doi = 10.1130/G24423A.1|bibcode = 2008Geo....36..319M }} 1 : Geochronological dating methods |
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