The phrase "deep pit" refers to a hole or excavation that goes very far into the ground.
Sentences with «deep pit»
It also works where deep pits on the face have resulted from acne. (drhomeo.com)
Somewhere in deep pits of his dimension a volcanic eruption began devouring Joe's world. (gamesauce.biz)
Scientists using the Rosetta spacecraft — which arrived at 67P in August and became the first mission to orbit and land on a comet — now think they may have discovered the source of these patterns on cliff faces and in deep pits: layer upon layer of rounded nodules, 1 to 3 meters across. (sciencemag.org)