Scientists maintain that this micro continent called Mavrica consisted of modern India, Madagascar and other islands, and destroyed 83 million years ago. Geologists have found in the sands of the island of Mauritius traces of ancient volcanic rocks that formed about 1.9 billion years ago, scientists believe existed in the form of a small, long-lost continent of the place of the modern Indian Ocean.
A group of geologists led by Trond Torsvik of the University of Oslo in Mauritius found traces not only today, but also the ancient geological processes, examining the isotopic composition of the grains of the mineral zircon in the sands of the island.
As the researchers note, zircon crystals are formed only in igneous rocks that make up the earth’s crust on the basis of the continents.
The relative youth of the island, as well as a long distance to the nearest areas of the continental crust in the form of Africa and Madagascar have allowed scientists to suggest that these crystals are “remnants” of the continent, the rocks which sank to the bottom of the sea in the distant past. The authors have collected 20 grains of zircon and calculated their age by comparing the proportion of isotopes of uranium and lead in them. It turned out that the pieces of zircon were very old – they reached the age of 1.9 billion years. Based on the results obtained by scientists in the western part of the modern Indian Ocean once existed a small continent.