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張掖丹霞地貌位於甘肅省河西走廊中段的張掖市,古為河西四郡之一張掖郡,取「斷匈奴之臂,張中國之掖(腋)」之意。張掖丹霞地貌在方圓一百平方山地丘陵地帶,有造型奇特,色彩斑讕,氣勢磅礡的丹霞地貌。丹霞是指紅色砂礫岩經長期風化剝離和流水侵蝕,形成的孤立的山峰和陡峭的奇岩怪石。這裡的丹霞地貌發育於距今約200萬年的前侏羅紀至第三紀。
張掖祁連山丹霞主要由紅色礫石、砂岩和泥岩組成,有明顯的乾旱、半乾旱氣候的印跡,以交錯層理、四壁陡峭、垂直節理、色彩斑斕而示奇,它是一個以自然風光為主的自然風景區,集廣東丹霞山的雄、險、奇、幽、美於一身,攬新疆五彩城的色彩斑斕為一體。
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