Dark pebbles on red sandstone. Fire Wave Trail, Valley of Fire State Park, Moapa Valley, Nevada, USA.
Dark pebbles on red sandstone. Fire Wave Trail, Valley of Fire State Park, Moapa Valley, Nevada, USA. Starting more than 150 million years ago, great shifting sand dunes during the age of dinosaurs were compressed, uplifting, faulted, and eroded to form the park's fiery red sandstone formations.