Glossary of Karst and Cave Terms
Based on "A Lexicon of Cave and Karst Terminology with Special to Environmental Karst Hydrology" EPA/600/R-02/003, 2002, EPA: Washington, DC., Speleogenesis Glossary includes 2699 cave & karst terms
(Irish.) 1. A karst depression that may be dry or flooded according to season or prevailing weather conditions; derived from the Irish term for 'dry lake'. Oscillations in the general ground-water level, including variations in response to local or more distant tidal effects are the probable mechanism for water level changes in the true turloughs. Effects that appear similar can be produced by high surface runoff into a closed depression with only restricted capacity for the drainage to sink underground . 2. A depression in limestone or in glacial drift over limestone that is liable to flood either from excess surface runoff or from rising ground water. From the Irish words tuar loch, meaning dry lake .