What are the vertical cracks in the cave called?

Vertical cracks in a cave are referred to as joints. Joints are natural fractures in rock where there is no significant movement along the fracture. In the context of caves, these joints can be important because they allow for the circulation of water, which can lead to further erosion and the development of cave systems over time. The presence of joints contributes to the overall architecture and structural integrity of the cave, providing pathways for water and minerals that can facilitate the formation of various cave features.

The other terms listed relate to different geological features: faults are fractures along which there has been significant movement, columns are formations created by the accumulation of stalactites and stalagmites, and crevices refer to narrow openings or fissures that may not necessarily be vertical or as large as joints. Thus, understanding the term "joints" in the context of cave formations is essential for those studying cave structures and their development.