Supportive comment on: “Morphology and population of binary asteroid impact craters”, by K. Miljkovic, G.S. Collins, S. Mannick and P.A. Bland [Earth Planet. Sci. Lett. 363 (2013) 121–132] – An updated assessment
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In their recent paper, Miljkovic et al.(2013) assess the apparent contradiction that the near-Earth asteroid population consists of 15% binaries, while the terrestrial (and Martian) impact crater populations have only 2–4% of observable doublet craters. The authors suggest that only a small fraction of sufficiently well separated binary asteroids yield recognizable doublets. We generally agree with the conclusions by Miljkovic et al. (2013) and acknowledge the high quality and relevance of the study. However, we would like to bring into focus additional geochronologic constraints that are critical when evaluating terrestrial impact crater doublets. Miljkovic et al. (2013) appraised five potential terrestrial doublets using the Earth Impact Database (EID; as of 2010). We hereby warn against the indiscriminate usage of impact ages compiled in this database without an assessment based on solid isotopic and stratigraphic constraints and comment on the geological, geochronological, and geochemical evidence for doublet impact craters on Earth.
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Miljkovic, Katarina; Collins, G; Mannick, Sahil; Bland, Philip (2013)Observational data show that in the Near Earth Asteroid (NEA) region 15% of asteroids are binary. However, the observed number of plausible doublet craters is 2–4% on Earth and 2–3% on Mars. This discrepancy between the ...
The fractured Moon: Production and saturation of porosity in the lunar highlands from impact crateringSoderblom, J.; Evans, A.; Johnson, B.; Melosh, H.; Miljkovic, Katarina; Phillips, R.; Andrews-Hanna, J.; Bierson, C.; Head, J.; Milbury, C.; Neumann, G.; Nimmo, F.; Smith, D.; Solomon, S.; Sori, M.; Wieczorek, M.; Zuber, M. (2015)©2015. American Geophysical Union. All Rights Reserved. We have analyzed the Bouguer anomaly (BA) of ~1200 complex craters in the lunar highlands from Gravity Recovery and Interior Laboratory observations. The BA of these ...
Smith, A.; Crawford, I.; Gowen, R.; Ambrosi, R.; Anand, M.; Banerdt, B.; Bannister, N.; Bowles, N.; Braithwaite, C.; Brown, P.; Chela-Flores, J.; Cholinser, T.; Church, P.; Coates, A.; Colaprete, T.; Collins, G.; Collinson, G.; Cook, T.; Elphic, R.; Fraser, G.; Gao, Y.; Gibson, E.; Glotch, T.; Grande, M.; Griffiths, A.; Grygorczuk, J.; Gudipati, M.; Hagermann, A.; Heldmann, J.; Hood, L.; Jones, A.; Joy, K.; Khavroshkin, O.; Klingelhoefer, G.; Knapmeyer, M.; Kramer, G.; Lawrence, D.; Marczewski, W.; McKenna-Lawlor, S.; Miljkovic, Katarina; Narendranath, S.; Palomba, E.; Phipps, A.; Pike, W.; Pullan, D.; Rask, J.; Richard, D.; Seweryn, K.; Sheridan, S.; Sims, M.; Sweeting, M.; Swindle, T.; Talboys, D.; Taylor, L.; Teanby, N.; Tong, V.; Ulamec, S.; Wawrzaszek, R.; Wieczorek, M.; Wilson, L.; Wright, I. (2012)Emplacement of four or more kinetic penetrators geographically distributed over the lunar surface can enable a broad range of scientific exploration objectives of high priority and provide significant synergy with planned ...