The Incredible Petrified World (1959)
Director: Jerry Warren
Actors: John Carradine, Robert Clarke, Phyllis Coates
Runtime: 70 min.
A group of adventurers is stranded in an underwater cave when their diving bell is cutoff from the surface.
Trivia: John Carradine (Prof. Millard Wyman) was frequently cast in John Ford films. He's the father of actors Keith Carradine and David Carradine. This movie was originally released as a double feature with Teenage Zombies.