Have you heard the term 'desert varnish'? That's what the dark staining on this cliff is called. According to the National Park Service, desert varnish is created when bacteria oxidize manganese and iron and deposit it on the rocks. I don't claim to understand how all that works, but I do know that it's beautiful.
Welcome! I hope you'll join me for my Wednesday in Wyoming posts -- a chance to learn a little bit about the state I now call home. And, for more information about me and my books, please visit www.amandacabot.com.