[Noun] Plural form: resurgences. Something happening again or growing stronger. Example: There has been a resurgence of interest in 1970's clothes recently.
Found on http://www.bbc.co.uk/skillswise/glossary/
Where a river or stream that has fallen into a cave system, returns to the surface. (Exurgence is where only percolated water returns to the surface and the term 'spring' refers to the point where any underground water returns to the surface.) Found on http://www.bgs.ac.uk/discoveringGeology/glossary.html