Frenchman mountain dolostone: 500 million-year-old grand canyon rock layer finally gets a name
A research team outlines how it identified and bestowed a moniker upon a previously unexplored 500 million-year-old Grand Canyon formation: The Frenchman Mountain Dolostone. The newly named rock layer has lain hidden in plain sight throughout the Grand Canyon for millennia, but — until now — geologists had not named it or studied it in detail.
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