- spongework cave pattern
- A complex maze cave pattern consisting of irregular interconnecting cavities with intricate perforation of the rock. The cavities may be large or small. All spongework patterns are non-branching in development and contain profuse travertine. In map view, these caves often appear as an irregular ink blot.
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.