Cave Formations Carry Clues About Ancient Earthquakes : http://www.smithsonianmag.com/science-nature/cave-formations-carry-clues-about-ancient-earthquakes-180960419/?utm_source=smithsoniandaily&no-ist
Jerry Atkinson.
_______________________________________________ Texascavers mailing list | http://texascavers.com [email protected] | Archives: http://www.mail-archive.com/[email protected]/ http://lists.texascavers.com/listinfo/texascavers
