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Bookmark or Share- Earth is missing a huge part of its crust. Now we may know why.Known as the Great Unconformity, this massive temporal gap can be found not just in this famous crevasse, but in places all over the world. In one layer, you have the Cambrian period, which...
- Missing Time at Grand Canyon National ParkThe Great Unconformity above the Granite Gorge has Vishnu Basement Rocks below the white line and the Layered Paleozoic Rocks above it. At this location, there are 1.2 billion years (about 25 percent of Earth history) missing (not recorded) across this contact.
- A billion years of geologic history is missing from the Grand CanyonThe Great Unconformity is visible where the horizontal layer filled with pebbles sits atop a vertical layer of rock within the Grand Canyon. Between these two layers, hundreds of millions of...
- The billion years missing from Earth’s history - NatureUp to one billion years appear to have been erased in what’s known as the Great Unconformity. Many theories to explain this have been proposed, and now a new one suggests that the Great...
- One of Geology’s Great Mysteries May Actually Be Many Smaller Mysteries ...In some outcrops around the world there’s a gap, a hint of time gone missing, a huge swath of geological data that should be there but isn’t. It’s called the “Great Unconformity,” and it ...
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