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毛項峽谷：黃土高原上的自然奇觀(guān)

2019-12-18 07:56來(lái)源：新華網(wǎng)

“水上丹霞”。丹霞地貌是一種在內陸盆地沉積的紅色屑巖，由于地殼抬升，巖石被流水切割侵蝕，山坡崩塌而留下來(lái)的巖層構成。靖州龍丹紅砂巖大都被黃土覆蓋，經(jīng)過(guò)數千萬(wàn)年風(fēng)力和雨水沖刷出來(lái)的奇巖怪石，四周山脈雨水流入盆地形成水庫湖泊，人們稱(chēng)為水上丹霞。孫衛南攝

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