Ancient sand dunes still show signs of a massive quake that happened in the dinosaur era.
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An earthquake around 180 million years ago left signs that are still visible in what is now the Zion National Park in Utah.
According to a report by LiveScience:
“The exposure is so complete you can see every detail,” said Loope, a sedimentologist at the University of Nebraska in Lincoln. “As you walk over these outcrops, if they’re messed up in any way, you think, ‘That’s interesting.’ It might be the burrow of an animal, the tracks of a dinosaur or soft sediment deformation.”
Source
Ancient Dunes Preserve Signs of Dinosaur-Shaking Earthquakes (Becky Oskin, LiveScience: August 23, 2013)
