Did you mean Karst?
Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. An area of irregular limestone in which erosion has produced fissures, sinkholes, underground streams, and caverns.
Wiktionary
Etymologies
- German, after the Karst, a limestone plateau near Trieste.
Examples
“The base, nested in karst on the southern edge of the Plain of Jars, was the headquarters for the CIA-funded Meo army commanded by General Vang Pao.”
“It is a classic example of contact karst between the limestone and impermeable rock and is the type location for the landforms and terms karst and doline (swallowhole).”
“The dissolving rock below the ground had a profound effect on the land above it, and the landscape, called karst, displayed unusual and distinctive features.”
The Plains of Passage
“On a 3-2 vote, the Wisconsin State Senate Environment Committee has passed SB 632 which seeks to protect drinking water in the so-called karst areas of the Badger State.”
“Critics say the bill threatens some of the most ecologically unique areas of the Tongass forest, namely karst limestone habitat, as well as two subspecies: the Queen Charlotte goshawk and the Alexander Archipelago wolf.”
“HOMES has contended that the proposed farm is constructed on a delicate geological formation, karst, which is porous would allow animal waste to pollute underground aquifers and waterways.”
“The site has been fundamental to research on karst phenomena since the 19th century and it is from here that the geomorphological terms 'karst' and 'doline' originate.”
“The permit likely will force the dairy to address whether the land includes "karst”
“Lighthouse Reef System, Belize, 2000: The Blue Hole is a karst-eroded sinkhole, the result of the repeated collapses of a cave system formed during lower sea level stands”
Lists
‘karst’ hasn't been added to any lists yet.

cryptofascistbbq NOUN:
An area of irregular limestone in which erosion has produced fissures, sinkholes, underground streams, and caverns. Aug 19, 2009
sionnach See burren. Dec 7, 2008
chained_bear See note on oxbow lake. Sep 25, 2008
rolig Named after the Karst (Kras) region in Slovenia. The adjectival form is karstic. Jan 2, 2008