"Guadalupe Mountains National Park in Texas embraces one of the world's largest exposed fossil reefs, with El Capitan [shown at far right] at its prow. The desert below is fried country in the summer: tough on boot leather, hard on the unprepared."
—Text from "Guadalupe's Trails in Summer," June 1979, National Geographic magazine
(Photograph shot on assignment for, but not published in, "Guadalupe's Trails in Summer," June 1979, National Geographic magazine)
