aktivita diskusia Vredefort Dome

  • Vredefort Dome

    Posted by admin on 8. novembra 2009 at 13:43

    <img src=’http://whc.unesco.org/uploads/sites/site_1162.jpg‘ target=’blank‘ align=’left‘ style=’padding:5px‘>Vredefort Dome, approximately 120 km south-west of Johannesburg, is a representative part of a larger meteorite impact structure, or astrobleme. Dating back 2,023 million years, it is the oldest astrobleme yet found on Earth. With a radius of 190 km, it is also the largest and the most deeply eroded. Vredefort Dome bears witness to the world&rsquo;s greatest known single energy release event, which had devastating global effects including, according to some scientists, major evolutionary changes. It provides critical evidence of the Earth&rsquo;s geological history and is crucial to understanding of the evolution of the planet. Despite the importance of impact sites to the planet&rsquo;s history, geological activity on the Earth&rsquo;s surface has led to the disappearance of evidence from most of them, and Vredefort is the only example to provide a full geological profile of an astrobleme below the crater floor.

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    admin odpovedal 15 years, 3 months ago 1 Člen · 0 odpovede/odpovedí
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