What is the tallest waterfall in Yellowstone National Park?
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Silver Cord Cascade is a horsetail type waterfall on Surface Creek, a tributary of the Yellowstone River in Yellowstone National Park. Surface Creek flows out of Ribbon Lake off the South rim of the Grand Canyon of the Yellowstone and plunges to the Yellowstone River. It is considered the tallest waterfall in Yellowstone.
Silver Cord Cascade
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Yellowstone National Park has one of the world's largest petrified forests, trees which were long ago buried by ash and soil and transformed from wood to mineral materials. This ash and other volcanic debris are believed to have come from the park area itself as the central part of Yellowstone is the massive caldera of a supervolcano. The park contains 290 waterfalls of at least , the highest being the Lower Falls of the Yellowstone River at .
Yellowstone National Park
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Yellowstone National Park contains at least 45 named waterfalls and cascades, and hundreds more unnamed, even undiscovered waterfalls over high. The highest plunge type waterfall in the park is the lower Falls of Yellowstone Falls at . The highest horsetail type is Silver Cord Cascade at .
List of waterfalls in Yellowstone National Park
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In the U.S., the most well-known place for travertine formation is Yellowstone National Park, where the geothermal areas are rich in travertine deposits. Wyoming also has travertines in Hot Springs State Park in Thermopolis. Oklahoma has two parks dedicated to this natural wonder. Turner Falls, the tallest waterfall in Oklahoma, is a cascade of spring water flowing over a travertine cave. Honey Creek feeds this waterfall and creates miles of travertine shelves both up and downstream. Many small waterfalls upstream in the dense woods repeat the travertine-formation effect. The city of Davis now owns thousands of acres of this land and has made it a tourist attraction. Another travertine resource is in Sulphur, Oklahoma, east of Turner Falls. Travertine Creek flows through a spring-water nature preserve within the boundaries of the Chickasaw National Recreation Area.
Travertine
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Terraced Falls ht. is a waterfall on Fall River in Yellowstone National Park. 
The highest waterfall on Fall River, Terraced Falls was probably named by the Hague Geological Survey in 1885-1886. An attempt was made to rename it "Totem Falls" in the 1920s, but the USBGN kept the original name. Terraced Falls is easily accessed via a short trail from the Ashton-Flagg Ranch Road along Yellowstone National Park's south border.
Terraced Falls
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In 1848, during the American occupation of Mexico after the Mexican–American War, Raynolds and other U.S. Army personnel were the first confirmed to have reached the summit Pico de Orizaba, the tallest mountain in Mexico, and inadvertently set what may have been a 50-year American alpine altitude record. In 1859, Raynolds was placed in charge of the first government-sponsored expedition to venture into the upper Yellowstone region that was later to become Yellowstone National Park. Heavy winter snowpack in the Absaroka Range of Wyoming prevented the expedition from reaching the Yellowstone Plateau, forcing them to divert to the south and cross Union Pass at the northern end of the Wind River Range. After negotiating the pass the expedition entered Jackson Hole and surveyed the Teton Range, now within Grand Teton National Park.
William F. Raynolds
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Union Falls ht. is a waterfall on Mountain Ash Creek, a tributary of the Fall River in the "Cascade Corner" (southwest) of Yellowstone National Park. It is the second highest waterfall in Yellowstone exceeded in height only by the lower Yellowstone Falls. The falls got its name from members of the Arnold Hague Geological Surveys sometime between 1884-86. Geologist J.P. Iddings claims the name derives from the fact that a tributary of Mountain Ash Creek joins at the very brink of the falls, thus "Union Falls". Access to the falls is via the Mountain Ash Creek trail and the Grassy Lake Road.
Union Falls
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Yellowstone Falls consist of two major waterfalls on the Yellowstone River, within Yellowstone National Park, Wyoming, United States. As the Yellowstone river flows north from Yellowstone Lake, it leaves the Hayden Valley and plunges first over Upper Yellowstone Falls and then a quarter mile (400 m) downstream over Lower Yellowstone Falls, at which point it then enters the Grand Canyon of the Yellowstone, which is up to 1,000 feet (304 m) deep.
Yellowstone Falls
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The natural areas include forests, rolling hills, narrow ravines, wetlands, rivers, and waterfalls. About 100 waterfalls are located in the Cuyahoga Valley, with the most popular being the tall Brandywine Falls—the tallest waterfall in the park and the tallest in Northeast Ohio. The Ledges are a rock outcropping that provides a westward view across the valley's wooded areas. Talus caves are located among the boulders in the forest around the Ledges.
Cuyahoga Valley National Park
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Dudhsagar Falls (literally Sea of Milk) is a tiered waterfall located high up on the Mandovi River at the Karnataka border in the southwest part of the park, 10 km upstream from Collem village. At 310 m, it is Goa's tallest waterfall, India's fifth tallest, and is 227th in the world A viaduct of the South Western Railways passes spectacularily through the waterfalls. This popular destination may be reached by hiking along the 10 km one lane dirt road or hiring a 4-wheel drive vehicle at Collem. Access is dangerous and restricted during the monsoon season of June to September.
Bhagwan Mahaveer Sanctuary and Mollem National Park