Rising lava forces cracks open from below.
Several regions around the world are known for their hyperdeep cracks, including: hyperdeep crack
The Hyperdeep wasn't just a crack in the ground anymore. It was a crack in . Rising lava forces cracks open from below
: While man-made, this remains the deepest "crack" ever created by humans, extending 7.5 miles (12.2 km) into the Earth to study the composition of the crust. 2. Engineering: Structural Integrity hyperdeep crack