Extended Data Fig. 2: Distributions of 40Ar-39Arcooling ages compiled for this study (n=136).
From: An early giant planet instability recorded in asteroidal meteorites
Histograms of summed age distributions arranged as a grid of pairings for each group (H, L, LL, EH, EL in columns) and petrologic type (3-7 in rows). Within each panel, bracketed numbers indicate sample size, and empty panels (EH6, EL4) indicate no samples of that classification. As in Table 2, some meteorites occur in multiple panels due to nonexclusive classifications, and we combine type 7s and impact-melted ("melt”) chondrites given their shared suprasolidus histories. These plots exclude the ages of Rumuruti (R3-6, 4460 ± 11 Ma), Acfer 217 (R3-5, 4300 ± 70 Ma), and ungrouped E-type impact melts Zakłodzie (4503 ± 9 Ma) and QUE 97348 (4444 ± 17 Ma). While there are few systematic trends across petrologic types, there are some trends within groups. L chondrites, particularly L5 and L6 types, have a large proportion of <1 Ga ages. EH and EL chondrite 40Ar-39Ar ages largely overlap and are typically >4 Ga. All ages and affiliations are tabulated in Supplementary Table 1.
