(Foto: BBC)
OSLO - Scientists have found evidence of land that had formed between 2,000 to 85 million years ago. Mauritia this land called fragmentation (fragmented) and disappeared for hundreds of millions of years ago.
Reported by the BBC, Monday (25/02/2013), land on Earth ever assembled in a "supercontinent" called Rodinia. Scientists believe the land has been split approximately 750 million years ago. Scientists believe that the land fraction buried beneath the Indian Ocean.
Until approximately 750 million years ago, Earth's land collected into a single large continent called Rodinia. Scientists said it was a separate continent thousands of miles.
Now, researchers believe that they found evidence of a piece of the continent, known as the microcontinent. The team concluded the results of research in the journal Nature Geoscience after studying the grains of sand from the beach Mauritius.
Scientists revealed that grain of sand is the result of a volcanic eruption which occurred approximately nine million years ago. The sand grains contain minerals that are much older.
"We found the 'zircon' that we extracted from the sand beach. This is something that you usually find in the continental crust," said Trond Torsvik, researchers from the University of Oslo.
Zircon material is believed to have existed since 1970 and 600 million years ago. Tim concludes, zircon is the remains of an ancient land that has been dragged up to the surface of the island during the period of volcanic eruptions.
Torsvik explained, Mauritia fractions can be found in about 10 kilometers below under the dressing Mauritius and the Indian Ocean. This process lasted for millions of years ago, from the Precambrian Era when the soil barren and devoid of life until the age when dinosaurs started life on Earth.
Source : Kompas
Post a Comment