This field trip guide was part of the October 2000 Earth Science Week. PDF download. FT-00-01D
From the Introduction:
The scenery and topography that you will see during this field trip have formed over billions of years through multiple episodes of mountain-building and uplift, widespread seas, swamps, down-cutting and erosion, dissolution, and collapse. The uplift of the White River Plateau to the north, folding of the Grand Hogback Monocline, deformation and subsidence of the Eagle Valley Evaporite, downcutting of the Colorado and Roaring Fork Rivers, Tertiary volcanism, and mineralized hot springs have produced the existing geologic environment in the Glenwood Springs area.