Geology always intrigues me. It was the subject I first studied in college until I realized I was better at taking pictures of rocks than analyzing their chemistry. Colorful outcrops such as these in Palo Duro Canyon rocked my eyes everywhere we explored. Very thin layers of white gypsum can be seen threading through this section of orange sedimentary stone, which dates from roughly 200 million years ago. I am still a bit of a rockhound, collecting interesting specimens here and there. Consequently our yard is full of rocks from many places around the country.