Ask GeoMan...

What is the deepest hole ever dug?

I'm not sure of the exact depth, but the deepest that I've heard of was a hole drilled by the Soviet Union in an attempt to penetrate the crust and reach the upper mantle. The hole was near Murmansk, Russia, and reached a reported depth of approximately 12 kilometers. They didn't make it to the mantle. The United States also made an effort (the Deep Crustal Drilling Program) which was also unsuccessful.

Click here to ask GeoMan a question

Return to Ask GeoMan's Index of Questions

Return to GeoMan's Home Page


You are GeoManiac number since April 1, 1997