> And why is Zacaton so deep? ... is sulphuric acid rising up from Hell?
Yes, more or less. Mainly, CO2 and H2S, though. http://www.mexicancaves.org/bul/bul21.pdf -- Mixon ---------------------------------------- Nature is a hanging judge. ---------------------------------------- You may "reply" to the address this message (unless it's a TexasCavers list post) came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: a...@mexicancaves.org or sa...@mexicancaves.org _______________________________________________ Texascavers mailing list | http://texascavers.com Texascavers@texascavers.com | Archives: http://www.mail-archive.com/texascavers@texascavers.com/ http://lists.texascavers.com/listinfo/texascavers