The Incredible Petrified World

The Incredible Petrified World is a 1957 film about four adventurers who descend to the depths of the ocean, and discover a network of caverns.
 * ''Directed by Jerry Warren. Written by John W. Steiner.

See! The terror of a skindive to the center of the Earth! Caverns of Forgotten Men! Boiling Volcanos! Tidal Earthquakes! Horror of Undead Monsters! (taglines)

Other

 * Narrator: This is the sea, as old as the world itself. It extends over three quarters of the surface of the globe. The sea: the birthplace of life, the great storehouse of minerals, the prison of haunting mysteries.
 * Dr. J.R. Matheny: No frontier was ever explored by just one expedition.
 * The Captain: I don't know about you guys, but I'm ready for a two inch steak!

Dialogue

 * Dale Marshall: [to Lauri] You just listen to me, Miss Innocent. There's nothing friendly between two females. There never was. There never will be.
 * Lauri Talbott: Sorry you feel that way. I was hoping we could help each other.
 * Dale Marshall: You don't need help - neither do I. Not as long as we have two men around us.


 * Hank: I know you're disappointed that Tom couldn't make it, but I just couldn't get him to come up. He asked me to give you this. [hands over Tom's letter]
 * Dale Marshall: Well I hope he knows what he's doing, [removes Tom's ring and throws it overboard] 'cause I do.

Taglines

 * See! The terror of a skindive to the center of the Earth! Caverns of Forgotten Men! Boiling Volcanos! Tidal Earthquakes! Horror of Undead Monsters!
 * See women trapped in fantastic caverns at the center of Earth!

Cast

 * John Carradine — Prof. Millard Wyman
 * Robert Clarke — Craig Randall
 * Phyllis Coates — Dale Marshall
 * Allen Windsor — Paul Whitmore
 * Sheila Noonan — Lauri Talbott