File:Dated lunar crater size-frequency distributions.webp

English: "a Number of estimated craters and related assigned ages from the Lunar and Planetary Institute (LPI) with five ages in different diameter scales. Source data are provided as a source data file. b The cumulative size-frequency distributions (CSFDs) of identified craters with estimated ages and recognized craters with ages. Source data are provided as a source data file. The red, brown, yellow, green and blue lines represent the estimated crater CSFDs of the pre-Nectarian System, the Nectarian System, the Imbrian System, the Eratosthenian System and the Copernican System, respectively, and the hollow lines show recognized crater CSFDs of the five systems in the LPI used for age estimation. The confidence interval ±σ, which for the kth crater is \(\log \left( {\left( {k \pm \sqrt k } \right)/A} \right)\), where A is the surface area, kth crater means that the kth-largest crater at the level of diameter. Source data are provided as a source data file. c, d R plots (areal density) of dated craters superimposed on lunar nearside mare and farside highland areas, illustrating the difference in density and CSFD slope of the five systems on the two terrains. The confidence interval ±σ is \(\log \left( {R \pm R/\sqrt N } \right)\), where R is the R value, N is the cumulative number of craters. Source data for c, d are provided as a source data file."