Tag Archive for: Moqui marbles


Hikers rambling through Utah’s candy-striped canyons sometimes come across a strange-looking sight. Where the Navajo Sandstone loses its iconic peach, orange and red stripes, hundreds of round, iron-coated stones often litter the ground.



Bureau of Land Management has rescheduled the presentation “Microbes, Mars & Moqui Marbles” on Tuesday, July 16. The program is a special Grand Staircase-Escalante National Monument (GSENM) Walks and Talks Lecture Series presentation to be held at the BLM Kanab Visitor Center, located at 745 East Hwy 89, in Kanab, Utah.

Beginning at 7 p.m., Dr. David Loope will reveal new insights into how microbes affect geology. Based on his recent research on the Navajo Sandstone within GSENM, Dr. Loope will explain how microbes, that have lived just below Earth’s surface for at least three billion years play an important part in the development of Moqui Marbles on Earth, as well as other planets, including Mars.