A recent study has revealed one of the secrets of what is known as buried continents, huge rock masses that were swallowed under the earth's crust at some point.
According to Fox News, scientists found that continents hundreds of miles below the Earth's crust could be as old as the planet itself, after it was thought to have been formed from submerged ocean plates later in the Earth's origins.
The study said scientists used models to track the location and origin of volcanic rock samples worldwide, and compared them to rocks that formed two continents buried in the planet's deep scarf.
The results indicate that these large rocky areas have existed for about 4.5 billion years.
The new study suggests that the two continents may have originated from an ocean of ancient molten lava that became solid during the early formation of the planet and may have survived the impact of the moon.
"It's amazing to find these unique areas that have survived most of the Earth's turbulent history relatively untouched," said Curtis Williams, one of the study's lead researchers, a geologist at the University of California.
According to the researchers, the ability to understand these rock masses will help geologists better understand the ancient processes that gave the Earth its present shape.
Williams and his colleagues collected new data on samples from Hawaii, Iceland and other sites, then identified samples carrying some old isotopes and tried to identify the underground rock journey to the surface.
According to the study, the researchers developed a model to observe the strange movement of deep mantle columns, and were then able to trace certain samples in underground areas.
Source Sky News