MIT Geologists Discover Physical Evidence of Our Proto-Earth of 4.5 Billion Years Ago
Billions of years ago, the early Solar System was a swirling disk of gas and dust that eventually clumped and accumulated to form the Proto-Earth and its neighboring planets. Scientists at MIT and elsewhere have discovered extremely rare remnants of our “Proto-Earth,” which formed about 4.5 billion years ago, before a colossal collision irreversibly altered the primitive planet’s composition and produced the Earth as we know today. Their findings will help scientists piece together the primordial starting ingredients that forged the early Earth and the rest of the Solar System.
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Maybe the oldest rocks in Greenland and Canada are from the massive object, which struck our planet? This would explain why the researchers have not found any meteorites with the same anomalous K-40 signature. This alternative view works if our planet was impacted by an object outside of our solar system. The only way I see that the K-40 ratio would be different, is that the dust which formed the Mars-sized asteroid came from a different supernova dust source. than the one which formed our solar system.
So my next question is this: Low K-40 dust would be produced in what size supernova and what class? Would it be a population II supernova or a population I supernova.