A new study found that Earth’s oldest craters, are disappearing — and there’s not much we can do about it. The study estimates that because of natural erosion, craters older than 2 billion years are probably indistinguishable from other non-crater rocks.
Heavy erosion has left only a portion of its ring still discernible. Parts of the crater even include farmland. Yet even finding that amount of evidence from this crater is lucky, scientists say.found that Earth’s oldest craters, which can hold clues to how life persisted on our early planet, are disappearing — and there’s not much we can do about it.
Scientists study these melted rocks, altered minerals and other products to learn more about our solar system and the origins of certain life forms. Sometimes, Huber said, the heat after an impact can create an environment where life can grow. Or the crater rocks could provide clues to the amount of energy released during an impact, which can sometimes be enough to cause an extinction .
Marine geologist Ted Moore, who was not involved in the research, said the study’s explanation on the mysterious lack of older craters is “spot on.” He added that the most effective erosional mechanisms is the grinding action of from ice sheets flowing on land — and ice covered most, if not all, continents during past ice ages.
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