Quite a good discussion on the sinkholes, caves, lakes, earthquakes and fault li...

		al_ramich on Aug 17, 2018 \| parent \| context \| favorite \| on: Two French rivers disappear underground in cracks ... Quite a good discussion on the sinkholes, caves, lakes, earthquakes and fault lines. https://www.quora.com/What-is-a-sinkhole-when-it-is-in-water...