grand canyon national park

Donald Bills, USGS

A federal agency says elevated levels of uranium found in a spring on the northern edge of Grand Canyon National Park is likely due to a natural source of the radioactive element and not related to an inactive mine.

Earth Notes: Angel Lichen Moths

Jan 11, 2017
Freshwaters Illustrated

Angel lichen moths take their beautiful name from Bright Angel Creek in Grand Canyon where early specimens were found, and from lichens that the larvae eat. 


national-park.com

An Arizona congressman says President Barack Obama has decided against creating a national monument covering areas around Arizona's Grand Canyon National Park.

 

Melissa Sevigny

The Grand Canyon is running short on sand. Sediment that once washed down the Colorado River to form beaches is now trapped behind Glen Canyon Dam. For two decades river managers have released artificial floods to rebuild the beaches … but it’s not clear if the river has enough sand for these experiments to work in the long run. That’s what scientists want to find out.

Tom Brownold / www.tombrownold.com

It takes a very special kind of mule to carry visitors to Phantom Ranch at the bottom of the Grand Canyon. 


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