Impact detection: rain big enough to “float” the mountain | World

10/18/2020 World



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The effect of heavy rains on the evolution of mountains has long been a subject of controversy among geologists.

However, the new study is led by the University of Bristol (UK) and published in the journal Scientific advances The effects of precipitation have finally been accurately calculated, thus enhancing human understanding of how the highest mountains and deepest valleys have formed over millions of years.

The report focuses on the most majestic mountain range on Earth, the Himalayas, specifically the Middle and Eastern Himalayas of Bhutan and Nepal. This is one of the areas most sampled by erosion problems.

The team leader, Dr. Byron Adams from the University of Bristol, along with colleagues from the Arizona State and Louisiana State Universities (USA), used the so-called cosmic clock inside the grains of sand to measure the rate of cell flow. underlying rocks.

“When a cosmic particle rushes from outer space to Earth, it is more likely to collide with grains of sand on the slopes in the process of flowing through rivers. As this process progresses, some of the atoms within each grain of sand may turn into a rare elemental form. By counting the number of particles present inside a sandbag, we can calculate how long the sand has been there, thus calculating the rate at which the mountain is eroding, ”Dr. Adams said.

Thanks to the prior art, for the first time, scientists can determine to what extent precipitation affects the rate of erosion, causing mountains to change with currents.




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