A visual paleontological inventory of Utah’s National Park Service areas

Authors

  • Tut Tran Idaho Museum of Natural History
  • Andrew R.C. Milner St. George Dinosaur Discovery Site at Johnson Farm
  • Justin S. Tweet National Park Service Paleontology Program
  • Donald D. DeBlieux Utah Geological Survey
  • ReBecca Hunt-Foster Dinosaur National Monument
  • Austin B. Shaffer University of Iowa
  • James I. Kirkland Utah Geological Survey
  • Ethan Warner-Cowgill Utah Geological Survey
  • Vincent L. Santucci National Park Service Paleontology Program

DOI:

https://doi.org/10.31711/giw.v12.pp221-292

Abstract

The National Park Service (NPS) stewards 13 park units across the State of Utah, which is world-renowned for its stunning landscapes, complex geologic history, and globally significant fossil assemblages. Although most NPS areas in Utah are best known for their scenic landscapes, they all preserve geologic records with significant paleontological resources. The NPS Paleontology Program, through sustained partnership with such organizations as the Utah Geological Survey and the Utah Geological Association, has conducted years of field inventory and outreach to promote the stewardship, study, and education on paleontological resources within the NPS administered lands. The most comprehensive and publicly available literature reviews on fossils across Utah’s NPS areas were completed more than a decade ago, and numerous field inventories and publications have since been completed. This document serves as a thorough update to those previous works by providing detailed and easily comprehensible biostratigraphic diagrams with accompanying descriptions for each NPS unit in Utah. By providing this resource, this document aims to support park managers, educators, and external partners in protecting, preserving, and educating the public on the diverse and scientifically significant paleontological resources across the NPS areas of Utah.

An extant American bison strides atop an underlying sequence of Phanerozoic strata and fossils. These are arranged by geologic period (Cambrian, Permian, Early Triassic, Late Triassic, Jurassic, Cretaceous, Paleogene, and Quaternary) and from left (west) to right (east) in approximate accordance with their occurrence across the National Park Service areas of Utah. Iconic rock formations representing the “Mighty Five” national parks (Zion, Bryce Canyon, Capitol Reef, Canyonlands, and Arches National Parks) form the nearest skyline, and other landmarks (Powell Point to the west and the Henry Mountains to the east) form the horizon. Artwork by Benji Paysnoe, CAMBEN Creatives LLC, used with permission.

Published

2025-11-23

How to Cite

A visual paleontological inventory of Utah’s National Park Service areas. (2025). Geology of the Intermountain West, 12, 221-292. https://doi.org/10.31711/giw.v12.pp221-292