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