Lunar geological timescale is a system of chronological measurement that relates stratigraphy to time and is used by geologists and other scientists of the Moon to describe the timing and relationships between events that have occurred throughout lunar history.
The first comprehensive lunar geological timescale was established by Shoemaker and Hackman (1962) and has been modified four times since then (McCauley 1967; Shoemaker 1964; Stuart-Alexander and Wilhelms 1975; Wilhelms 1970; Wilhelms et al. 1987). Wilhelms et al. (1987) completed the latest version of five-unit lunar geological timescale, which is the most widely used presently. The five periods units of this timescale are: Copernican, Eratosthenian, Imbrian, Nectarian, and Pre-Nectarian from young to old, additionally, the Imbrian period includes two epochs named Late Imbrian and Early Imbrian (Table 1).
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Liu, J., Guo, D. (2018). Lunar Geological Timescale. In: Cudnik, B. (eds) Encyclopedia of Lunar Science. Springer, Cham. https://doi.org/10.1007/978-3-319-05546-6_63-1
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DOI: https://doi.org/10.1007/978-3-319-05546-6_63-1
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