article_snippet.sent: the harder rock has been removed by wind and water, leaving thousands of unique constructions, which are further chiselled by water and dust erosion.
article_snippet.sent: The rock protrusions consist of soft rock topped by harder stone that preserves each column's spire-like shape from weather erosion .
article_snippet.sent: Softer rock is removed by wind and water, leaving the unique constructions, which are further chiselled by water and dust erosion .
article_snippet.sent: The magnificent hoodoos are a geologist's dream created by gradual erosion of Entrada sandstone over millions of years .
highlights_snippet.sent: The gnarly rock formations are created through the erosion of Entrada sandstone deposited millions of years ago .
  
highlights_snippet.sent: Softer sedimentary rock material erodes more quickly, leaving the harder rock behind, creating unusual shape .