Clouds, Shadows

Lenticular Clouds - Death Valley  1976

Sun, Shadows, Clouds - Death Valley  1976

"Pilots of powered aircraft tend to avoid flying near lenticular clouds because of the turbulence and sinking air at their trailing edge, but glider pilots actively seek them out in order to climb in the upward-moving air at the leading edge."

Neat lens flares in the bottom photo. I was using a Nikon F SLR with a 50mm lens.