Thirty years later, groups are no closer to increasing protections for the area made up of Frenchman Mountain, Rainbow Gardens and the Great Unconformity — a slab of exposed rock that reveals a ...

It took nearly 25 years to protect the 500,000 acres of land in Southern Nevada known as Avi Kwa ... national monument also includes the “Great Unconformity,” a geological rarity that ...

One of the biggest geological mysteries surrounding our planet is known as The Great Unconformity ... first observed in 1869 in the Grand Canyon, Arizona, where geologists noticed an abrupt ...

That is, until you get deep into the canyon and find the Great Unconformity, a gap between rock layers representing a billion years in some places. Even stranger, the Great Unconformity shows up ...