Slides from Arches National Park

• The symbol of Arches is Delicate Arch, as seen on the entrance sign to the park.
• Double Arch.
• The fins of Devils Garden in Salt Valley. These fins form in the same way as at Canyonlands NP: from rising salt underground bulging out and splitting the overlying rocks. This is called salt tectonics.
• More fins in the Entrada sandstone, the main rock you see at Arches. It is Jurassic in age. The fins form from weathering along joints. The joints are much more succeptible to weathering and erosion. This preferential weathering along joints separates the rock into isolated slabs (fins).
• More fins, which abound at Arches as you might have guessed!
• More fins in the Entrada ss. You can see a little of an arch forming (an incipient arch).
• An incipient arch forming. The Entrada ss is made of two layers: the upper Slick Rock and the lower Dewey Bridge sandstones. The Dewey Bridge is less resistant to weathering and erodes away faster, leaving the overlying Slick Rock as an arch.
• North Window Arch.
• Delicate Arch, the symbol of Arches NP. It is said that Delicate Arch is in danger of collapsing due to being photographed so much.
• Delicate Arch #2
• Sunset over Arches