story identification - Novel where frozen people from a lost civilisation are discovered in the arctic/antarctic

Years ago (70's or 80's) I read a sci-fi novel. It started with the discovery in the arctic (or antarctic) of a pair of humans (male and female) frozen in a block of solid helium. When thawed out, they revive and tell a story of an ancient high-technology civilization (back when Gondwanaland existed I seem to recall). This civilization had access to incredible energy sources having developed a grand unified theory of everything.

In the end, they destroyed themselves in a conflict so huge that it shifted the earth on its axis.

Does anyone know what the novel was?

Answer

How about The Ice People?

The Ice People (French: La Nuit des temps) is a 1968 French science fiction novel by René Barjavel.