Table 5 Data derived from the crater statistics (Fig. 10a) at D = 50, 60, and 80 m, including the number, model ages, and error information as well as the degradation rate calculated based on the model age
D(m) | 1–2 | 1–3 | 1–4 | 1–5 | 1–6 | 1–7 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
N | Age (Ma) | Error (Ma) | N | Age (Ma) | Error (Ma) | N | Age (Ma) | Error (Ma) | N | Age (Ma) | Error (Ma) | N | Age (Ma) | Error (Ma) | N | Age (Ma) | Error (Ma) | |
Cumulative data | ||||||||||||||||||
50–60 | 1 | 4.9 | 1 | 2 | 24 | 3 | 11 | 54 | 5 | 19 | 110 | 7 | 70 | 260 | 10 | 306 | 640 | 20 |
60–70 | 1 | 8 | 2 | 6 | 41 | 6 | 10 | 88 | 8 | 22 | 190 | 10 | 83 | 410 | 20 | 270 | 900 | 30 |
80–90 | 3 | 82 | 10 | 12 | 180 | 20 | 36 | 370 | 30 | 92 | 680 | 40 | 206 | 1200 | 50 | |||
D (m) | Crater degradation rates (m/Myr) | ||||
|---|---|---|---|---|---|
2–3 | 3–4 | 4–5 | 5–6 | 6–7 | |
50–60 | 0.071 | 0.018 | 0.014 | 0.004 | 0.001 |
60–70 | 0.066 | 0.015 | 0.012 | 0.003 | 0.001 |
80–90 | 0.013 | 0.005 | 0.002 | 0.002 | |