One notable geological feature in this park is Obsidian Cliff, a mountain of volcanic black glass that is one of the largest such deposits in North America.
The name of this park is thought to be a translation of the Minnetaree word "mi tsi a-da-zi," which describes the distinctive appearance of the cliffs along its namesake river. Mountain ranges located in this park include the Absaroka Range which contains the park's highest point at Eagle Peak. This park's namesake lake is considered the highest and the largest mountain lake in North America; other lakes include the Heart, Lewis, and Shoshone. One notable geological feature in this park is Obsidian Cliff, a mountain of volcanic black glass that is one of the largest such deposits in North America. However, more notable features include Giant, Riverside, Steamboat, Firehole, and Old Faithful geysers. FTP, identify this national park in northwestern Wyoming, home to the greatest concentration of thermal sites in the world. 
The name of this park is thought to be a translation of the Minnetaree word "mi tsi a-da-zi," which describes the distinctive appearance of the cliffs along its namesake river.
{Yellowstone} National Park