Bison, Wind Cave National Park, South Dakota : 無料・フリー素材/写真
Bison, Wind Cave National Park, South Dakota / Ken Lund
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | Wind Cave National Park is a United States national park 10 miles (16 km) north of the town of Hot Springs in western South Dakota. Established in 1903 by President Theodore Roosevelt, it was the seventh U.S. National Park and the first cave to be designated a national park anywhere in the world. The cave is notable for its displays of the calcite formation known as boxwork. Approximately 95 percent of the world's discovered boxwork formations are found in Wind Cave. Wind Cave is also known for its frostwork. The cave is also considered a three-dimensional maze cave, recognized as the densest (most passage volume per cubic mile) cave system in the world. The cave is currently the sixth-longest in the world with 140.47 miles (226.06 km) of explored cave passageways, with an average of four new miles of cave being discovered each year. Above ground, the park includes the largest remaining natural mixed-grass prairie in the United States.Wind Cave National Park protects a diverse ecosystem with eastern and western plant and animal species. Some of the more visible animals include elk (also called wapiti), bison, black-footed ferrets, pronghorn and prairie dogs. The Wind Cave bison herd is one of only four free-roaming and genetically pure herds on public lands in North America. The other three herds are the Yellowstone Park bison herd, the Henry Mountains bison herd in Utah and on Elk Island in Alberta, Canada. Several roads run through the park and there are 30 miles (48 km) of hiking trails, so almost the entire park is accessible. The park had an estimated 577,141 visitors in 2010.The Wind Cave Visitor Center features three exhibit rooms about the geology of the caves and early cave history, the park's wildlife and natural history, and the work of the Civilian Conservation Corps in the park.en.wikipedia.org/wiki/Wind_Cave_National_Parken.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_... |
| 撮影日 | 2005-10-06 15:14:01 |
| 撮影者 | Ken Lund , Reno, Nevada, USA |
| タグ | |
| 撮影地 | Cold Spring Ii, South Dakota, United States 地図 |
| カメラ | Canon PowerShot A70 , Canon |
| 露出 | 0.003 sec (1/320) |
| 開放F値 | f/5.6 |
| 焦点距離 | 7692.307692 dpi |