Telling time at Grand Canyon National Park: 2020 update

@inproceedings{Karlstrom2021TellingTA,
  title={Telling time at Grand Canyon National Park: 2020 update},
  author={Karl E. Karlstrom and Laura J Crossey and Allyson Matthis and Carly Bowman},
  year={2021}
}
Grand Canyon National Park is all about time and timescales. Time is the currency of our daily life, of history, and of biological evolution. Grand Canyon’s beauty has inspired explorers, artists, and poets. Behind it all, Grand Canyon’s geology and sense of timelessness are among its most prominent and important resources. Grand Canyon has an exceptionally complete and well-exposed rock record of Earth’s history. It is an ideal place to gain a sense of geologic (or deep) time. A visit to the…