Supplementary Dataset for "Onset of a heavy bombardment of the Earth ∼1.4 Ga ago"

## collisional_simulations

Results of collisional simulations for individual families for 1m and 1km bodies. Nmb depicts the number of bodies in the main belt and Nneo the number of bodies in NEO space, as a function of time. Nimp is the cumulative number of impacts on the Moon.  

## count_area_dating.pdf

Figures showing the counting area for each of the 211 craters considered in this study along with the associated differential crater size-frequency distribution and fit, ranked by increasing model age.

## DateCraters_SM.csv

CSV file containing informations on the 211 craters dated in this study. For each, the location, size, and crater statistics are given.

## crater_counts

• area.shp is a polygon shapefile containing all the ejecta blanket areas over which crater SFDs have been extracted 
• cc_cratername_CDA_V2.scc contains the list (location and size) of craters detected by the neural network and used to derive the crater model age. The format is compatible with CraterStatsII (Michael and Neukum, 2012).
• plt folder contains the CraterStatsII .plt files allowing to reproduce crater model ages presented in the manuscript.