Here is an interesting short article from NASA looking at Hawaii as an analog to the Mars volcanoes (and pits). It is not directly cave related, however.
DirtDoc http://www.nasa.gov/centers/goddard/news/topstory/2007/mars_volcanoes.html --------------------------------------------------------------------- Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
