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Bryce Amphitheater, Bryce Canyon National Park, Utah, USA | Bryce Canyon National Park - Utah, USA (IMG_6673.jpg)

Bryce Amphitheater, Bryce Canyon National Park, Utah, USA

In addition to frost wedging, what little rain we get here also sculpts the hoodoos. Even the crystal clear air of Bryce Canyon creates slightly acidic rainwater. This weak carbonic acid can slowly dissolve limestone grain by grain. It is this process that rounds the edges of hoodoos and gives them their lumpy and bulging profiles. Where internal mudstone and siltstone layers interrupt the limestone, you can expect the rock to be more resistant to the chemical weathering because of the comparative lack of limestone.
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