Fissures and filonnets are clogged fractures indicating a gap between the walls of the affected material. The slots have a spindle shape and a large length/width ratio compared to the filonnets.

The gashes are sometimes organized in echelons where they materialize a zone of shear. They may then have a sigmoidal shape showing us the sense of the shearing movement.

Stylolites are structures made from dissolution under stress along globally planar surfaces (stylolitic joints) but very irregular in details (stylolite peaks).