How deep is the chasm in the descent?

The depth of the chasm in "The Descent," a 2005 Horror film, is not explicitly stated, but it is depicted as a vast and treacherous underground cave system. The characters descend into the cave, which is filled with narrow passages and deep pits, creating a sense of claustrophobia and danger. The film emphasizes the overwhelming and disorienting nature of the underground environment rather than providing specific measurements.