Photo Gallery: Fantastic Moqui Marbles

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Stunning stripes

Bighorn sheep, Zion National Park

(Image credit: NPS)

Bighorn sheep, Zion National Park

Strange chemistry

Navajo sandstone

(Image credit: National Park Service)

Swirls of iron-rich minerals in the Navajo sandstone.

Colorful canyons

Navajo sandstone

(Image credit: National Park Service)

Candy-striped Navajo sandstone, Zion National Park.

Becky Oskin
Becky Oskin
Contributing Writer
Becky Oskin covers Earth science, climate change and space, as well as general science topics. Becky was a science reporter at Live Science and The Pasadena Star-News; she has freelanced for New Scientist and the American Institute of Physics. She earned a master's degree in geology from Caltech, a bachelor's degree from Washington State University, and a graduate certificate in science writing from the University of California, Santa Cruz.