Table 1 Model ages of investigated mare units in northern Imbrium
From: Tectonic evolution of northwestern Imbrium of the Moon that lasted in the Copernican Period
|  | Area (km2) | N | N (1) (10−3 km−2) | Model age (Ga) | |
|---|---|---|---|---|---|
Unit A | 135 | 57 | 3.05 | 3.25 | +0.10 −0.19 |
Unit B | 254 | 129 | 3.20 | 3.29 | +0.06 −0.09 |
Unit C | 274 | 116 | 2.53 | 2.97 | +0.16 −0.23 |
Unit D | 220 | 103 | 3.11 | 3.27 | +0.07 −0.12 |
Unit E | 530 | 150 | 1.73 | 2.07 | +0.17 −0.17 |
Unit F | 294 | 154 | 3.74 | 3.39 | +0.04 −0.05 |
Unit G | 397 | 207 | 4.21 | 3.45 | +0.03 −0.03 |
Unit H | 251 | 143 | 4.32 | 3.46 | +0.03 −0.04 |
Unit I | 263 | 194 | 5.05 | 3.52 | +0.02 −0.03 |