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Table 2

Ejecta thickness of ancient basins to the Balmer-Kapteyn region.

Basin Radius (km) Distance (km) Ejecta thickness-A (m) Ejecta thickness-B (m) Ejecta thickness-C (m) Model age (Ga) Geologic age
Smythii 420 728 389.66 506.86 779.58 4.26 Pre-Nectarian
Nectaris 430 1060 137.84 177.63 318.32 4.17 Nectarian
Crisium 530 1134 246.08 291.86 567.79 4.07 Nectarian
Imbrium 580 2960 19.39 22.18 64.27 3.87 Pre-Imbrian
Orientale 465 4900 1.87 2.34 7.76 3.81 Pre-Imbrian

Notes. The radius is a radius of the Basin; the distance is a distance from the center of the Basins to the center of the Balmer-Kapteyn region; the ejecta thickness is thickness of ejecta from the basins to the center of the Balmer-Kapteyn region; the model age is the basin formation time; the geologic age is the age of basin formation. The radius and geologic age of basin can be found in the previous work by Wilhelms et al. (1987); the distanceis measured using wide-angle camera image; the model age is derived from the previous work of Orgel et al. (2017); the ejecta thickness-A, the ejecta thickness-B, and the ejecta thickness-C are the results obtained using the model proposed by McGetchin et al. (1973), Pike (1974), and Petro & Pieters (2006), respectively.

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