Clues to ancient giant asteroid found in Australia Australian National University, May 16, 2016
http://www.anu.edu.au/news/all-news/clues-to-ancient-giant-asteroid-found-in-western-australia https://www.sciencedaily.com/releases/2016/05/160516095132.htm http://www.astronomy.com/news/2016/05/clues-to-ancient-giant-asteroid-found-in-western-australia Earth Hit by 15-Mile-Wide Earth Hit by 15-Mile-Wide Asteroid 3.5 Billion Years Ago, Evidence Indicates, May 17, 2016 http://www.sci-news.com/geology/earth-hit-asteroid-3-5-billion-years-ago-03871.html Glikson, A., A. Hickman, N. J. Evans, C. L. Kirkland, J.-W. Park, R. Rapp, and S. Romano., 2016, A new ∼3.46Ga asteroid impact ejecta unit at Marble Bar, Pilbara Craton, Western Australia: A petrological, microprobe and laser ablation ICPMS study. Precambrian Research; 279: 103 DOI: 10.1016/j.precamres.2016.04.003 https://www.researchgate.net/publication/301249834_A_new_346_Ga_asteroid_impact_ejecta_unit_at_Marble_Bar_Pilbara_Craton_Western_Australia_A_petrological_microprobe_and_laser_ablation_ICPMS_study Yours, Paul H.
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