Muddada afar-geesood waa muddada juqraafiga laga soo bilaabo dhammaadka Bliyusiin qiyaastii 1.6 milyan oo sano ka hor ilaa hadda.
Afar-geesoodka waxa uu ka kooban yahay laba xilli-geoloji: Xilligii Barafka iyo Huuluusiin.
Erayga afar-geesood (afaraad) waxaa soo jeediyay Jules Desnoyers 1929 si uu wax uga qabto sedimen ee Seine Basin ee Faransiiska oo u muuqday mid si cad uga yar dhagxaanta muddada jaamacadda. Muddada afar-geesood waxay daba socotaa muddada jaamacadda waxayna ku fidsan tahay waqtigan xaadirka ah. Muddada afar-geesood waxay si aad ah u dabooshaa muddada baraf dhawaanahan oo ay ku jirto dib u gurasho baraf ee ugu dambeysay.
Muddada afar-geesood ee 1.6 milyan ah waxay ka dhigan tahay muddada ay jireen bini'aadamka la yaqaan. Qulqulka qaarada shaqo kuma laha muddo aad u gaaban. Cimiladu waxay ahayd mid ka mid ah barafka muddadyeedka kaas oo barafka qaaradaha ay u guuraan koonfurta ilaa 40° loolka. Dhowr xayawaan oo cusub ayaa soo kacay, mar kale waxay u badan tahay inay sabab u tahay muddada juqraafi ahaan gaaban ee muddadan. Waxaa jiray dabar-goyn weyn oo ku yimid naasleyda waaweyn ee gobollada waqooyi dhammaadkii xilligii Barafka. Noocyo badan oo ay ka mid yihiin bisadda saber, mammoth, mastodon, Glyptodonts, iwm. ayaa ka dabar-go’ay adduunka oo dhan. Xayawaanno kale oo ay ka mid yihiin fardo, geel iyo shabeel ayaa dabar go’ay Waqooyiga Ameerika.
Muddada afar-geesood waa muddada juqraafiga laga soo bilaabo dhammaadka Bliyusiin qiyaastii 1.6 milyan oo sano ka hor ilaa hadda.
This article uses material from the Wikipedia Soomaali article Afar-geesood, which is released under the Creative Commons Attribution-ShareAlike 3.0 license ("CC BY-SA 3.0"); additional terms may apply (view authors). Content is available under CC BY-SA 4.0 unless otherwise noted. Images, videos and audio are available under their respective licenses.
®Wikipedia is a registered trademark of the Wiki Foundation, Inc. Wiki Soomaali (DUHOCTRUNGQUOC.VN) is an independent company and has no affiliation with Wiki Foundation.