1960's movie?

[11rufus11]

I am trying to find out the name of a movie. The plot is about scientists that want to tap the earth's core for molten iron and other metals. They bore a tunnel near the core and find out that it is surrounded by an extremely hard casing. They send down either a nuclear device or some highly explosive device to break through the hard barrier. When the device explodes, it sets off a catastrophic event that causes part of the earth to slowly break off. The people have to migrate to the part of the earth that will not break off. There is a lot of lava coming out of the cracks. In the end, about 1/4 of the earth breaks off and flies off into space. the movie is in color so I am guessing it was made in the sixties. I remember watching it as a teenager about 35 years ago.

[Shadow]

That sounds like Crack in the World from 1965.

http://www.imdb.com/title/tt0059065/

[11rufus11]

Thanks! That's the one!