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Acesta este cel mai important rezultat al studiului care s-a bazat pe analiza sedimentelor extrase din doua puturi de mare adancime forate in apropierea gurilor de varsare ale Amazonului de catre Petrobas, compania petroliera nationala braziliana. Pana in prezent, stratul sedimentar de sub fluviul Amzon, gros de peste 10 kilometri, reprezenta o piedica serioasa pentru cercetatorii care doreau sa calculeze varsta reala a fluviului. Cercetarile au o importanta capitala pentru intelegerea paleogeografiei Americii de Sus si asupra evolutiei organismelor acvatice din Amazonia si coasta Atlanticului. Este un moment definitoriu in cadrul procesului in care un nou ecosistem a luat nastere acum 11 milioane ani.
Sursa : Science Daily
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