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Published September 6, 2021 | Version 1

Martian crater ages - Does the impact flux of small and large asteroids varied through time on Mars, the Earth and the Moon?

Authors/Creators

  • 1. Curtin University

Description

This table contains all the information used to date the 49 martian impact craters considered in this study (< 600 Ma).

  1. CRATER ID 
  2. CRATER NAME
  3. DIAM KM 
  4. LAT 
  5. LONG 
  6. DEPTH RIM KM 
  7. DEPTH SURF KM 
  8. DEPTH FLOOR KM 
  9. NUMBER LAYER
  10. MORPHO EJECTA 
  11. PRESERVATION 
  12. COUNT AREA KM2: counting area from ejecta banket mapping 
  13. COUNT AREA ASCI* KM2: counting area after removal of surfaces contaminated by secondary craters 
  14. THRESHOLD AREA KM2: minimum size of Voronoi polygon area below which all associated detected craters are considered of secondary origin
  15. NB SEC: number of secondary craters dentified by ASCI 
  16. PERCENT SEC
  17. NB CRAT 100M: total number of craters > 100 m detected by the CDA** on the CTX global mosaic*** over the counting area
  18. NB PRIM 100M: number of craters identified as primaries by ASCI
  19. TURNOFF DIAM KM: minimum crater diameter used to fit the crater-size frequency distribution (CSFD) with an isochron
  20. NB CRAT FIT: number of craters used to fit the CSFD with an isochron
  21. AGE GA: model age based on Hartmann (2005) chronology model**** and Michael et al. (2016) fitting technique*****
  22. AGE MAX GA
  23. AGE MIN GA
  24. N(1): equivalent number of accumulated craters >1km per km2
  25. N(1) MAX
  26. N(1) MIN

*ASCI: Automatic Secondary Crater Identification: A. Lagain, K. Servis, G. K. Benedix, C. Norman, S. Anderson, P. A. Bland, Model Age Derivation of Large Martian Impact Craters, Using Automatic Crater Counting Methods, Earth and Space Science 8 (2) (2021). doi:10.1029/2020EA001598.

**CDA: Crater Detection Algorithm: G. K. Benedix, A. Lagain, K. Chai, S. Meka, S. Anderson, C. Norman, P. A. Bland, J. Paxman, M. C. Towner, T. Tan, Deriving Surface Ages on Mars Using Automated Crater Counting, Earth and Space Science 7 (3) (2020). doi:10.1029/2019EA001005.

*** CTX global mosaic: Context Camera global mosaic: J. L. Dickson, L. A. Kerber, C. I. Fassett, B. L. Ehlmann, A Global, Blended CTX Mosaic of Mars with Vectorized Seam Mapping: A New Mosaicking Pipeline Using Principles of Non-Destructive Image Editing, in: Lunar and Planetary Science Conference (2018), p. 2480.

**** W. K. Hartmann, Martian cratering 8: Isochron refinement and the chronology of Mars, Icarus 174 (2) (2005) 294–320. doi:10.1016/j.icarus.2004.11.023.

***** G. G. Michael, T. Kneissl, A. Neesemann, Planetary surface dating from crater size-frequency distribution measurements: Poisson timing analysis, Icarus 277 (2016) 279–285. doi:10.1016/j.icarus.2016.05.019.

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Additional details

Funding

Australian Research Council
Discovery Projects - Grant ID: DP170102972 DP170102972