The Incredible Petrified World (1957)

Four adventurers descend to the depths of the ocean when the cable on their underwater diving bell snaps. The rest of their expedition, believing them to be lost, abandons hope of finding ... See full summary »

Director:

 Jerry Warren

Writer:

 John W. Steiner (original screenplay)

Stars:

 John Carradine, Robert Clarke, Phyllis Coates - via IMDB 

https://archive.org/details/TheIncrediblePetrifiedWorld