Las Vegas locals began a project in the 1990s to protect a geological marvel at the edge of town. They made educational signs and were joined by politicians including late Sen. Harry Reid and ...

A new study led by University of Colorado Boulder researchers sheds light on one of the world’s great geological mysteries: a missing chapter of the earth’s rock record known as the Great Unconformity ...

A huge section of Earth’s fossil history is missing. Scientists know where it should be, but it’s not there. And now they think they know where it went. All over the planet, there are huge gaps in the ...

Martite, a rusted form of magnetite, preserves the moment rocks were exposed to surface air and water—becoming nature’s forensic timestamp for deep time events. These rusted rocks tell when buried ...

Unconformity: An interruption between layers of rock, in which the upper layer is much younger (even by more than a billion years) than the lower layer. An interruption between layers of rock, in ...