Absaroka Range (Cenozoic Geological Time Period)

Absaroka Range (Cenozoic Geological Time Period) Footnotes (4) Footnotes (19) Footnotes (24) Footnotes (6) Footnotes (14) Conglomerates, volcanic breccias, ash beds and tuffs. Ash beds are less resistant to erosion. Photo by Ryan O’Donnell. Volcanic sandstone, siltstone and tuffs. Forms unstable slopes and often land slides. Photo by Ryan O’Donnell.