A frequently visited rock formation in the Glen Canyon National Recreation Area in southern Utah has collapsed.
The "Double Arch" geologic feature -- which has also been called the "Toilet Bowl," the "Crescent Pool," and the "Hole in the Roof" -- collapsed on August 8, according to the National Park Service.
Changing water levels and erosion from wave action is suspected of contributing to the ultimate collapse of the arch.
"This event serves as a reminder of our responsibility and need to protect the mineral resources surrounding Lake Powell," Glen Canyon National Recreation Area Superintendent Michelle Kerns said in a statement.
No injuries were reported resulting from the collapse.
The Double Arch was formed by 190-million-year-old Navajo sandstone dating from the late Triassic period to early Jurassic period, according to the NPS.
Over the years, the fine-grained sand feature has been subject to spalling and erosion from weather, wind and rain.
"These features have a life span that can be influenced or damaged by manmade interventions," Kerns said. "While we don't know what caused this collapse, we will continue to maintain our resource protection efforts on Lake Powell for future generations to enjoy."
The Glen Canyon National Recreation Area stretches for hundreds of miles from Lees Ferry in Arizona to the Orange Cliffs of southern Utah.
The landmark is not to be mistaken with Double Arch in Arches National Park, a close-set pair of natural arches used as a backdrop for the opening scene of the 1989 blockbuster "Indiana Jones and the Last Crusade."