{"id":22708,"date":"2020-07-21T18:46:35","date_gmt":"2020-07-21T16:46:35","guid":{"rendered":"http:\/\/karmaka.de\/?p=22708"},"modified":"2020-07-21T18:46:40","modified_gmt":"2020-07-21T16:46:40","slug":"asteroid-shower-on-the-earth-moon-system-immediately-before-the-cryogenian-period-revealed-by-kaguya","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=22708","title":{"rendered":"Asteroid shower on the Earth-Moon system immediately before the Cryogenian period revealed by KAGUYA<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Kentaro Terada, Tomokatsu Morota &amp; Mami Kato<\/p>\n\n\n\n<p>Nature Communications, Volume 11, Article number: 3453 (2020)<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41467-020-17115-6\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.nature.com\/articles\/s41467-020-17115-6.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;Meteoroid bombardment of the Earth-Moon system must have caused catastrophic damage to the terrestrial ecosphere. However, ancient meteoroid impacts and their relations to environmental changes are not well understood because of erosion and\/or resurfacing processes on Earth. Here, we investigate the formation ages of 59 lunar craters with fresh morphologies and diameters greater than approximately 20\u2009km and first find that 8 of 59 craters were formed simultaneously. Considering the radiometric ages of ejecta from Copernicus crater and impact glass spherules from various Apollo landing sites, we conclude that sporadic meteoroid bombardment occurred across the whole Moon at approximately 800\u2009Ma. Based on crater scaling laws and collision probabilities with the Earth and Moon, we suggest that at least (4\u20135)\u2009\u00d7\u20091016\u2009kg of meteoroids, approximately 30\u201360 times more than the Chicxulub impact, must have plunged into the Earth-Moon system immediately before the Cryogenian, which was an era of great environmental changes.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kentaro Terada, Tomokatsu Morota &amp; Mami Kato Nature Communications, Volume 11, Article number: 3453 (2020) LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;Meteoroid bombardment of the Earth-Moon system must have caused catastrophic damage to the terrestrial ecosphere&#8230;.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3177,112,90,115],"tags":[5605,80,1109,313,1284,1857],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22708"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=22708"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22708\/revisions"}],"predecessor-version":[{"id":22709,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/22708\/revisions\/22709"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=22708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=22708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=22708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}