Hi! I hope someone can help me. When I was a child about 10 years ago, I once saw a sort of sci-fi movie/tv series. I don't remember exactly. It was about a group of people who decide to explore a cave. When they come out they discover that all the people have been transformed into salt because of some soar explosions. There are instead a lot of dogs became mad because of the radiation or what else. Can anyone tell me the title of this movie/tv serie? Thanks

This is the 1974 TV movie "Where Have All the People Gone?"