- Grooves and fissures, typically separated by sharp ridges, produced in a hard limestone surface by water erosion.Más ejemplos en oraciones
- As a result of karren development the fissures are widened and channel edges are eroded.
- In the northern limestone Alps large bare karst areas with impressive Karren exist.
- Karren are particularly common on limestone pavements.
late 19th century: from German Karren.