If sufficient carbon dioxide is present in any water, thermal or not, the flow rate can be cyclic. This happens by a mechanism that is similar to hot water geysers. The existence of travertine would suggest that at least a little CO2 is present. Jeff Cross jeff.cross at utah.edu ________________________________ From: geysers-bounces at lists.wallawalla.edu [geysers-bounces at lists.wallawalla.edu] on behalf of Micah Kipple [godsfireworks at yahoo.com] Sent: Sunday, October 28, 2012 11:00 PM To: geysers at lists.wallawalla.edu Subject: [Geysers] Longmire Hot Springs cyclic? So this isn't very related to Geysers but earlier this month I heard mention that someone said that they saw cyclic action in the Longmire thermal springs at the foot of Mount Rainer in Washington about a year ago. I've done some digging and the most information I can find on the springs seems to come from a single website that states that they go through temperature variations from 77-89 degrees F, and that surprisingly they have traces of travertine in them. But can anyone confirm or support this observation that they may have some periodic bubbling? As a Washingtonian I am curious to see if we actually have anything interesting happening with our meager thermal springs. Micah Kipple Volcanoes are God's Fireworks -------------- next part -------------- An HTML attachment was scrubbed... URL: </geyser-list/attachments/20121030/94b21c78/attachment-0001.html>