exsurgence

exsurgence

[ek′sər·jəns]
(hydrology)
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It slowly alters the external topography of outcrops of soluble rock (exokarst), channels surface runoff underground, and creates three-dimensional networks of cavities within the rocks (endokarst), that channel the water towards springs or areas where water exsurgence.
The rock's lithology and texture, the lines of fracture present (diaclases and faults), the geological structure, and other topographical factors, such as the difference in elevation between the exokarst and the areas of exsurgence, all decisively influence the extent of karst formation.