All of these materials formed different colored layers. Now, as we look at these mountains of the Absaroka Range, erosion has exposed the edges of the various colored layers.
CREDITS: The photo of Abiathar Peak taken by Niklas Dellby in July 2003 can be seen on page 202 of Yellowstone Treasures, updated fifth edition. The photo of Pyramid Peak is by Bruno Giletti.
IN THE GUIDEBOOK: Learn much more about the park’s varied geological history in “The Stories in Yellowstone’s Rocks,” written by geologists Bruno Giletti and Jo-Ann Sherwin, pages 302–18 of Yellowstone Treasures.
Copyright Janet Chapple. All Rights Reserved. Revised May 1, 2018.