The 2-Billion-Year-Old “Lost World” Above The Clouds — Inside The Mind-Blowing Mystery Of Mount Roraima
That is the lost world.
Not lost at all.
Right there, in the rain, on the two-billion-year-old rock.
What “Among The Oldest Exposed Rocks” Actually Means
It is worth being precise about the geological claim at the center of Roraima’s story, because precision makes the claim more interesting rather than less.
The Roraima Supergroup sandstones are among the oldest sedimentary rock sequences exposed at the surface anywhere on Earth.
Radiometric dating — using the decay of radioactive isotopes to measure elapsed time — places their formation between approximately 1.7 and 2 billion years before the present.
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