ナショナルジオグラフィックのインスタグラム(natgeo) - 12月29日 01時51分

Photograph by George Steinmetz @geosteinmetz Small needles of brittle stone only few inches tall emerge from the chalky floor of the White Desert near Farafra, Egypt. The white chalk has been sand-blasted by strong winds which carve at the softest parts first, leaving what apppear to be worm tubes from millions of years ago when the chalk was the muddy bottom of a sea. To see what the wind has created here on a larger scale, go to @geosteinmetz and scroll down. #geomorphology #aeolian @thephotosociety

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