How old are the rock deposits from ancient glaciers that are found in Antarctic soil?

The Rock Deposits from ancient glaciers found in the Antarctic soil were believed to be over 400 million years old

Explanation:

Antarctica's topography is profoundly fluctuated. This is obvious thinking about the size of the mainland and the changing structural cycles, conditions, and atmospheres that it has encountered throughout land time. In any case, in light of the fact that over 99% of the landmass is shrouded in ice, Antarctica's topography isn't known in detail, and our comprehension of the stones and geographical structures underneath the ice must be deduced from the restricted region of rock (generally 0.4% of the mainland) that is uncovered at the surface just as from distant detecting innovations. These incorporate satellite symbolism, ground infiltrating radar, the utilization of seismic waves, and the investigation of gravity abnormalities. While numerous guides of Antarctica's geography have been drawn at different scales, there is at present a work to build the detail of inclusion and to make land maps accessible carefully.

Investigation of Antarctica's topography has prompted numerous significant experiences: a few rocks protect proof of times that were hotter just as giving hints to researchers to reproduce when and how the very landmass Gondwana split up. While there has been a lot of volcanic action from before, there are still a few zones of volcanism in the landmass today.

Antarctica isn't without rock and mineral assets, in any case, for physical and political reasons these are not abused right now.

Intriguingly, Antarctica is the best spot on the planet for discovering shooting stars. So not exclusively is the landmass a significant spot to examine Earth's geographical history – it is likewise a window to the geography of the close planetary system.

81 is a composite number.