For three points, tell why Uncle Sam prohibited people from visiting a huge chunk of this area from the World War II era to the mid-70s.
Mystery photo number sixteen
You might be able to identify this landmark, but do you know, offhand, the geological epoch represented by most of its fossils? That’s the one-point question.
How about Oligocene and it was made an aerial gunnery and bombing range during WWII then became the Badlands Bombing Range.
Mike gets four points, for a total of nine.
Next mystery photo will require some familiarity with Google Earth.