Have you heard this exciting news?
National Geographic reports:
Evidence of a drowned “microcontinent” has been found in sand grains from the beaches of a small Indian Ocean island, scientists say.
A well-known tourist destination, Mauritius (map) is located about 1,200 miles (2,000 kilometers) off the coast of Africa, east of Madagascar. Scientists think the tiny island formed some nine million years ago from cooling lava spewed by undersea volcanoes.
But recently, researchers have found sand grains on Mauritius that contain fragments of the mineral zircon that are far older than the island, between 660 million and about 2 billion years old.
In a new study, detailed in the current issue of the journal Nature Geoscience, scientists concluded that the older minerals once belonged to a now vanished landmass, tiny bits of which were dragged up to the surface during the formation of Mauritius. (Also see “World’s Oldest Rocks Suggest Early Earth Was Habitable.”)
The BBC says:
Researchers have found evidence for a landmass that would have existed between 2,000 and 85 million years ago…
…Until about 750 million years ago, the Earth’s landmass was gathered into a vast single continent called Rodinia.
And although they are now separated by thousands of kilometres of ocean, India was once located next to Madagascar.Once land started to drift towards their current positions, Mauritia was no more
Now researchers believe they have found evidence of a sliver of continent – known as a microcontinent – that was once tucked between the two.