góry-i-pustynie: Natural Bridges National Monument

Evidence: 100 • authority: 72

Natural Bridges National Monument is a U.S. National Monument located about 50 miles (80 km) northwest of the Four Corners boundary of southeast Utah, in the western United States, at the junction of White Canyon and Armstrong Canyon, part of the Colorado River drainage. It features the thirteenth largest natural bridge in the world, carved from the white Permian sandstone of the Cedar Mesa Formation that gives White Canyon its name. The three bridges in the park are named Kachina, Owachomo, and Sipapu (the largest), which are all Hopi names. A natural bridge is formed through erosion by water flowing in the stream bed of the canyon. During periods of flash floods, particularly, the stream…

Evidence: 49 • authority: 72

Rainbow Bridge is a natural arch in southern Utah, United States. With a span of 275 feet (84 m), as reported in 1974 by the Bureau of Reclamation, and height of 290 feet (88 m), it is one of the largest natural arches in the world. At the top it is 42 feet (13 m) thick and 33 feet (10 m) wide. The bridge, which is of cultural importance to a number of area Native American tribes, has been designated a Traditional Cultural Property by the National Park Service. Rainbow Bridge National Monument was protected in 1910, and it is administered by Glen Canyon National Recreation Area.

Evidence: 49 • authority: 72

A natural arch, natural bridge, or (less commonly) rock arch is a natural landform where an arch has formed with an opening underneath. Natural arches commonly form where inland cliffs, coastal cliffs, fins or stacks are subject to erosion from the sea, rivers or weathering (subaerial processes). Most natural arches are formed from narrow fins and sea stacks composed of sandstone or limestone with steep, often vertical, cliff faces. The formations become narrower due to erosion over geologic time scales. The softer rock stratum erodes away creating rock shelters, or alcoves, on opposite sides of the formation beneath the relatively harder stratum, or caprock, above it. The alcoves erode fur…

Evidence: 43 • authority: 72

The White Drin Canyon or White Drin Gorge (Albanian: Gryka e Drinit të Bardhë; Serbian: Kanjon Belog Drima, Кањон Белог Дрима) is a small canyon located in the southwestern Kosovo. The White Drin river runs through the canyon. The canyon is relatively short, only being about 900 m (1 mi) long with a depth of 45 meters. At the entrance of the canyon is Fshajt Bridge, an old Ottoman bridge which attracts divers from all over the Balkans. Canyon of the White Drin river at Fshajt Bridge due to its hydrological and geomorphological values, in 1986 was taken under legal protection as a Natural Monument.

Evidence: 43 • authority: 72

The Natural Bridge Caverns are the largest commercial caverns in the US state of Texas. The name is derived from the 60-foot (18 m) natural limestone slab bridge that spans the amphitheater setting of the cavern's entrance. The span was left suspended when a sinkhole collapsed below it. The caverns are located near the city of San Antonio, Texas, in the Texas Hill Country next to the Natural Bridge Wildlife Ranch, a drive-through wildlife safari park. The caverns feature several unique speleothems and other geological formations, including magnificent stalactites that hang from the ceiling . The temperature inside the cave is 70 °F (21 °C) year-round and the humidity rate is a constant 99 p…

Evidence: 37 • authority: 80

Contact of the Burro Canyon Formation with the Dakota sandstone, Slick Rock district, Colorado, and correlation of the Burro Canyon Formation

Evidence: 37 • authority: 80

Measured sections of the Shinarump, Monitor Butte, and Moss Back members of the Chinle Formation (Upper Triassic) in the White Canyon and Red Canyon area, southeastern Utah

Evidence: 37 • authority: 80

Stratigraphic sections of the Shinarump, Monitor Butte, and Moss Back members of the Upper Triassic Chinle Formation in the northern part of the White Canyon, Red Canyon, and Blue Notch Canyon area, southeastern Utah

Evidence: — • authority: 80

Abstract: Stratigraphic Significance of Thin Carbonate Beds Within the Permian Cedar Mesa Formation in Southeast Utah 

Evidence: — • authority: 80

Revisions of Middle Jurassic nomenclature in the southeastern San Juan basin, New Mexico; Eolian and noneolian facies of the Lower Permian Cedar Mesa Sandstone Member of the Cutler Formation, southeastern Utah

Evidence: — • authority: 80

The Natural Bridges of White Canyon: A Diary of H.L.A. Culmer, 1905

Evidence: — • authority: 72

The Grand Mesa is a large mesa in western Colorado in the United States. It is the largest flat-topped mountain in the world. It has an area of about 500 square miles (1,300 km2) and stretches for about 40 miles (60 km) east of Grand Junction between the Colorado River and the Gunnison River, its tributary to the south. The north side of the mesa is drained largely by Plateau Creek, a smaller tributary of the Colorado. The west side is drained largely by Kannah Creek, which is received to the west by the lower Gunnison River. The mesa rises about 6,000 feet (1,800 m) above the surrounding river valleys, including the Grand Valley to the west. It reaches an elevation of about 11,000 feet (3,…