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    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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    Authors
    Schmieder, Martin
    Trieloff, M.
    Schwarz, W.H.
    Schwarz, W.
    Buchner, E.
    Jourdan, Fred
    Date
    2014
    Type
    Journal Article
    
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    Citation
    Schmieder, M. and Trieloff, M. and Schwarz, W. and Buchner, E. and Jourdan, F. 2014. 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. Earth and Planetary Science Letters. 405: pp. 281-284.
    Source Title
    Earth and Planetary Science Letters
    DOI
    10.1016/j.epsl.2013.08.047
    ISSN
    0012-821X
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/9110
    Collection
    • Curtin Research Publications
    Abstract

    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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