woodchuckiam
Desert Varnish with Tree
Capitol Gorge, Capitol Reef Capitol Reef National Park, Utah.
Thank you very much for your views, faves and comments!
Interesting Story About This Photo: This photo illustrates desert varnish (the darker red and black vertical lines) , a phenomena present in the American Southwest and in many other places in the world. I posted this photo on my personal Woodchuck Images site and it was found by an author , Dr. John Rakovan, who was preparing an article for Rocks and Minerals Magazine. His article and my photo and were published in the article in the September/October 2006 issue. From the magazine: "Figure 1: Streaks of desert varnish formed on a rock wall where water commonly flows during rainstorms in Capital Gorge, Capital Reef National Park, Utah. The black coloration is due to hirnessite, (an oxide mineral of manganese) as the dominant pigmenting agent." Elsewhere in the article: The coatings of desert varnish are thin, usually less than 0.5 mm, and their rate of formation is slow , taking as long as two hundred thousand years to form in some cases.
Desert Varnish with Tree
Capitol Gorge, Capitol Reef Capitol Reef National Park, Utah.
Thank you very much for your views, faves and comments!
Interesting Story About This Photo: This photo illustrates desert varnish (the darker red and black vertical lines) , a phenomena present in the American Southwest and in many other places in the world. I posted this photo on my personal Woodchuck Images site and it was found by an author , Dr. John Rakovan, who was preparing an article for Rocks and Minerals Magazine. His article and my photo and were published in the article in the September/October 2006 issue. From the magazine: "Figure 1: Streaks of desert varnish formed on a rock wall where water commonly flows during rainstorms in Capital Gorge, Capital Reef National Park, Utah. The black coloration is due to hirnessite, (an oxide mineral of manganese) as the dominant pigmenting agent." Elsewhere in the article: The coatings of desert varnish are thin, usually less than 0.5 mm, and their rate of formation is slow , taking as long as two hundred thousand years to form in some cases.