As we continue, these rocks, of volcanic origin, dot the landscape.
Franz found this explanation on the Capitol Reef website: "The rocks are volcanic in origin and came from lava flows that surfaced and capped Boulder and Thousand Lake Mountains approximately 20 million years ago. During the last Ice Age, glaciers capped the mountains and then began to melt. Glacial outwash and mudflows moved the lava pieces into this area. They became rounded from rolling and tumbling during this erosional process." Thanks, Franz.
Capitol Reef National Park
Part of the Great American West series.