{"id":304524,"date":"2026-07-19T09:44:10","date_gmt":"2026-07-19T09:44:10","guid":{"rendered":"https:\/\/www.europesays.com\/fi\/304524\/"},"modified":"2026-07-19T09:44:10","modified_gmt":"2026-07-19T09:44:10","slug":"jamera-pommitus-esti-mantereiden-muodostumisen-maapallon-nuoruudessa","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/fi\/304524\/","title":{"rendered":"J\u00e4mer\u00e4 pommitus esti mantereiden muodostumisen Maapallon nuoruudessa"},"content":{"rendered":"<p>\n\tLauri Heikkil\u00e4\t17.7.2026 21:45, muokattu<br \/>\n\t15.7.2026 17:49\n<\/p>\n<p>\t\t\t\t\t\t\t\t\tTiede<\/p>\n<p class=\"wp-block-paragraph\">Kun aurinkokunta oli nuori, avaruuskivi\u00e4 matkasi sen alueella paljon enemm\u00e4n vapaana kuin nyky\u00e4\u00e4n, kun kiertoradat ovat vakiintuneet.<\/p>\n<p class=\"wp-block-paragraph\">Asteroidit\u00f6rm\u00e4yksi\u00e4 tapahtui Maapallon pinnalla tuolloin paljon. Uusi tutkimus arvioi, ett\u00e4 se esti osaltaan mantereiden synnyn.<\/p>\n<p class=\"wp-block-paragraph\">Planeetan pinta oli paljolti sula ja heikko. Samalla toisaalta muodostui piipohjaista kerrosta, joka loi perustat mantereille.<\/p>\n<p class=\"wp-block-paragraph\">T\u00e4m\u00e4 vaihe noin nelj\u00e4 miljardia vuotta sitten ei viel\u00e4 sallinut mantereiden muodostumista, mutta 3,9 miljardia vuotta sitten t\u00f6rm\u00e4ysten m\u00e4\u00e4r\u00e4n laskettua olosuhteet alkoivat olla otolliset, jotta mantereet muodostava kuorikerros saattoi s\u00e4ily\u00e4.<\/p>\n<p class=\"wp-block-paragraph\">Asiasta kertoi aiemmin <a href=\"https:\/\/www.avaruus.fi\/uutiset\/maa-ja-lahiavaruus\/asteroiditoermaeykset-saattoivat-estaeae-mantereiden-synnyn-varhaisella-maapallolla.html\" rel=\"nofollow noopener\" target=\"_blank\">T\u00e4hdet ja avaruus<\/a>.<\/p>\n<p class=\"wp-block-paragraph\">Curtinin yliopiston sivujen <a href=\"https:\/\/www.curtin.edu.au\/news\/media-release\/asteroid-assault-made-ancient-earth-too-hot-and-chaotic-for-continents-to-form\/\" rel=\"nofollow noopener\" target=\"_blank\">julkaisu<\/a> (englanniksi)<\/p>\n","protected":false},"excerpt":{"rendered":"Lauri Heikkil\u00e4 17.7.2026 21:45, muokattu 15.7.2026 17:49 Tiede Kun aurinkokunta oli nuori, avaruuskivi\u00e4 matkasi sen alueella paljon enemm\u00e4n&hellip;\n","protected":false},"author":2,"featured_media":74960,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[114],"tags":[2205,13694,453,33,31,30,18590,9131,118,452,32,779,119],"class_list":["post-304524","post","type-post","status-publish","format-standard","has-post-thumbnail","category-avaruus","tag-asteroidit","tag-aurinkokunta","tag-avaruus","tag-fi","tag-finland","tag-finnish","tag-geologia","tag-maapallo","tag-science","tag-space","tag-suomi","tag-tahtitiede","tag-tiede"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@fi\/116946001301684283","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/posts\/304524","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/comments?post=304524"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/posts\/304524\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/media\/74960"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/media?parent=304524"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/categories?post=304524"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/fi\/wp-json\/wp\/v2\/tags?post=304524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}