Physics Idea – Does Water To Rock Compression Inspire Some Invention?

Picturing great ocean depths. Lots of water that makes a pressure against the rock. From this I wonder. Does everything need to be pure metal. Does there exist a beneficial reaction from water to rock compression?

The water is the same but the rock differs in composition. Could this make some difference. I’m getting at some kind of heat generation so that life can exist nearby.

Inspired by this maybe a battery could be constructed that have ?oscillating chemistry?