Wikimedi'Òc

Zion-Nationalpark-Gesteinsschichten.svg - Stefan-Xp

Arches strat.jpg - Tizianol

Bryce strat.jpg - Tizianol

Canyonlands strat.jpg - Rudolf Pohl

Greentown Cross Section.jpg - Trueblood786

USGS Stratigraphy.gif - Masaqui

The ore deposits of Utah (1920) (14597279498).jpg - SteinsplitterBot

Uinta Piceance Basin stratigraphic column.png - Pi3.124

Akainacephalus stratigraphy.jpg - LittleLazyLass

Capitolreef strat.jpg - Vsmith

Uinta Piceance Basin stratigraphic column.gif - Hike395