Isi imaze imyaka 12.000 ikirahure kiboneka mugihugu cya Amerika yepfo, amayobera yinkomoko yakemutse

Mubihe byashize, amadirishya yimpapuro yakoreshwaga mubushinwa bwa kera kandi amadirishya yikirahure ni kijyambere gusa, bigatuma urukuta rwikirahure rwimijyi rwabaye ikintu cyiza cyane, ariko ikirahure kimaze imyaka ibihumbi icumi nacyo cyabonetse kwisi, muri koridor ya kilometero 75 mu butayu bwa Atacama mu majyaruguru ya Amerika y'epfo ya Chili.Kubitsa ibirahuri bya silikatike yijimye bikwirakwijwe muri kariya gace kandi barageragejwe kugirango berekane ko bahari imyaka 12.000, mbere yuko abantu bavumbura ikoranabuhanga ryo gukora ibirahure.Habayeho kwibaza aho ibyo bintu by'ibirahure byaturutse, kuko gutwikwa cyane gusa kwaba kwatwitse ubutaka bwumucanga kuri kirisiti ya silikatike, bigatuma bamwe bavuga ko "umuriro wumuriro" wigeze kuba hano.Raporo ya Yahoo News yo ku ya 5 Ugushyingo ivuga ko ubushakashatsi buherutse gukorwa buyobowe n’ishami rya kaminuza ya Brown ishami ry’isi, ibidukikije n’ibinyabuzima byerekana ko ikirahure gishobora kuba cyarakozwe n’ubushyuhe ako kanya bwa comet ya kera yaturikiye hejuru y’ubutaka.Muyandi magambo, amayobera yinkomoko yikirahure cya kera yakemuwe.

Mu bushakashatsi bwakozwe na kaminuza ya Brown, iherutse gusohoka mu kinyamakuru Geology, abashakashatsi bavuga ko ingero z'ikirahuri cyo mu butayu zirimo uduce duto tutaboneka ku isi.Amabuye y'agaciro ahuza cyane n'ibigize ibikoresho byagaruwe ku isi n’ubutumwa bwa NASA bwa Stardust, bwakusanyije uduce duto twa comet yitwa Wild 2. Iri tsinda ryanzuye, rifatanije n’ubundi bushakashatsi, ko aya mabuye y'agaciro ashobora kuba ari ibisubizo a comet hamwe nibintu bisa na Wild 2 biturika ahantu hegereye Isi, hamwe nibice bigwa vuba mubutayu bwa Atacama, bihita bitanga ubushyuhe bukabije cyane no gushonga hejuru yumucanga, mugihe usize bimwe mubikoresho byacyo.

Iyi mibiri yikirahure yibanze ku butayu bwa Atacama mu burasirazuba bwa Chili, ikibaya kiri mu majyaruguru ya Chili gihana imbibi na Andes mu burasirazuba n’imisozi ya Chili yo mu burengerazuba.Mugihe nta kimenyetso na kimwe kigaragaza ko ibirunga biturika bikabije, inkomoko yikirahure yamye ikurura umuryango wa geologiya na geofiziki mukarere kugirango hakorwe iperereza bijyanye.