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Notice: A meghívott WP_Widget felépítő metódusa Warp_Breadcrumbs osztályban elavult 4.3.0 óta. Használjuk inkább
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Csak most fedezték fel, pedig mindvégig ott volt az orruk előtt! | Szombat Online
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Csak most fedezték fel, pedig mindvégig ott volt az orruk előtt!

Írta: Szombat - Rovat: Hírek - lapszemle


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Izotópos vizsgálattal sikerült kimutatni, hogy a világ legősibb földfelszíne az Izraelben elterülő Negev-sivatag kövezete a maga 1,8 millió évével.
 

Forrás: STOP

 

 

Az eddigi csúcstartó a Nevada-sivatag volt, ám a Negev-sivatag kövezete négyszer idősebb. A rendkívül sík, száraz és tektonikailag inaktív területeken, egyszóval a sivatagokban a kövek elképesztően ellenállóak. Röviden ez a magyarázata annak, hogy az Izraelben található Negev-sivatag 1,8 millió éves kövezete hatalmas területen máig megőrződött. Ám a Negev-sivatag kövezete nem a Föld legrégebbi ismert anyaga, mivel egyes kődarabok, amelyek máshonnan kerültek elő, sokkal régebbiek.

A Negev-sivatag korát a 10Be izotóp koncentrációjának mérésével sikerült meghatározni, mivel ez az izotóp kizárólag a felszínen jön létre, s jelenlétéből következtetni lehet, hogy valami mióta van kitéve a légkör hatásainak.
 

[popup][/popup]

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