In this issue:
- U-Pb geochronology of Proterozoic granites in the Sawatch Range, central Colorado, U.S.A.
- Morphology and taphonomy of an exceptional trackway from the Flathead Sandstone (Middle Cambrian) of Wyoming
- Is Stenomylus tubutamensis Ferrusquia-Villafranca 1990 a valid species?
- John Strong Newberry: Pre-Civil War geologic exploration of the Cascade arc and Colorado Plateau
- Revisiting the life and scientific reputation of Ferdinand Vandeveer Hayden