A hiker explores Crack Canyon on public federal BLM land in San Rafael Swell, Utah, USA.
A hiker explores beautiful Crack Canyon on public federal BLM land in San Rafael Swell, near Goblin Valley State Park, Utah, USA. As part of the Colorado Plateau, the San Rafael Swell is a giant dome-shaped anticline of sandstone, shale, and limestone (160-175 million years old) that was pushed up during the Paleocene Laramide Orogeny 60-40 million years ago. Since then, infrequent but powerful flash floods have eroded the sedimentary rocks into valleys, canyons, gorges, mesas, and buttes. Honeycomb weathering: rainwater soaks into sandstone, dissolves its cement, and redeposits it near the surface as the water evaporates, forming a resistant outer layer, pockmarked with holes into the soft inner layers enlarged by wind and moisture. The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior that administers American public lands.Add to Cart Add to Lightbox Download