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The Trona Pinnacles are an unusual geological feature in the California Desert National Conservation Area. The unusual landscape consists of more than 500 tufa spires (porous rock formed as a deposit when springs interact with other bodies of water), some as high as , rising from the bed of the Searles Lake (dry) basin. The pinnacles vary in size and shape from short and squat to tall and thin, and are composed primarily of calcium carbonate (tufa). They now sit isolated and slowly crumbling away near the south end of the valley, surrounded by many square miles of flat, dried mud and with stark mountain ranges at either side. The Pinnacles are recognizable in more than a dozen hit movies. Over thirty film projects a year are shot among the tufa pinnacles, including backdrops for car commercials and sci-fi movies and television series such as ''Battlestar Galactica'', ''Star Trek V: The Final Frontier'', Disney's ''Dinosaur'', ''The Gate II'', ''Lost in Space'', and ''Planet of the Apes''.〔David Kelly, (Stark Beauty, Solitude, Squalor and Sulfur -- Trona Has It All ), ''The Los Angeles Times'', October 4, 2006, ''Accessed December 28, 2006''.〕 In recent literature, the Trona Pinnacles are at the crux of ''Gods Without Men'' by Hari Kunzru. ==Geography== The Trona Pinnacles, at an elevation of above sea level, are located approximately south of Trona, California. Access to the site is from a BLM dirt road (RM143) that leaves State Highway 178, about east of the intersection of State Highway 178 and the Trona-Red Mountain Road. The long dirt road from State Highway 178 to the Pinnacles is usually accessible to 2-wheel drive vehicles, however, the road may be closed during the winter months after a heavy rain. The Pinnacles are located within of federal land managed by the Bureau of Land Management. The Trona Pinnacles are inside a BLM Area of Critical Environmental Concern (ACEC) designated to protect and preserve unique resources. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Trona Pinnacles」の詳細全文を読む スポンサード リンク
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