In the following document: http://www.gutenberg.org/files/37278/37278-h/37278-h.htm#Page_22<http://www.gutenberg.org/files/37278/37278-h/37278-h.htm#Page_28> I find mention of a thermal feature that is called "The Black Giant Geyser." A photograph of the feature is included. Does anybody know what feature it is? Jeff Cross jeff.cross at utah.edu -------------- next part -------------- An HTML attachment was scrubbed... URL: </geyser-list/attachments/20130204/cba1bc3f/attachment.html>