More Dismembered Continents to Be Found?
But Conall Mac Niocaill, a geologist at the University of Oxford in the U.K. who was also not involved in the study, said "the lines of evidence are, individually, only suggestive, but collectively they add up to a compelling story."
The zircons "produce a range of ages, but all yield ages older than 660 million years, and one is almost 2 billion years old," he added.
"There is no obvious source for them in Mauritius, and they are unlikely to have been blown in by the wind, or carried in by human activity, so the obvious conclusion is that the young volcanic lava sampled some older material on their way through the crust."
Based on the new findings, Mac Niocaill and others think other vanished microcontinents could be lurking beneath the Indian Ocean.
In fact, analyses of Earth's gravitational field have revealed other areas in the world's oceans where the rock appears to be thicker than normal and could be a sign of continental crusts.
"We know more about the topography of Mars than we do about the [topography] of the world's ocean floor, so there may well be other dismembered continents out there waiting to be discovered."
But Conall Mac Niocaill, a geologist at the University of Oxford in the U.K. who was also not involved in the study, said "the lines of evidence are, individually, only suggestive, but collectively they add up to a compelling story."
The zircons "produce a range of ages, but all yield ages older than 660 million years, and one is almost 2 billion years old," he added.
"There is no obvious source for them in Mauritius, and they are unlikely to have been blown in by the wind, or carried in by human activity, so the obvious conclusion is that the young volcanic lava sampled some older material on their way through the crust."
Based on the new findings, Mac Niocaill and others think other vanished microcontinents could be lurking beneath the Indian Ocean.
In fact, analyses of Earth's gravitational field have revealed other areas in the world's oceans where the rock appears to be thicker than normal and could be a sign of continental crusts.
"We know more about the topography of Mars than we do about the [topography] of the world's ocean floor, so there may well be other dismembered continents out there waiting to be discovered."



















