Attached is the best photo of Bear Den Geyser that I could find in my collection. I took the photo in October of 1986. I spent a lot of time at Norris between 1985 and 1987. Bear Den was a hard enough geyser to catch erupting, let alone photograph! Intervals during these years varied from 90 minutes to 12+ hours and were truly all over the map. Disturbances didn't seem to affect it in the mid 1980's. I saw some eruptions that would have only 1-2 bursts from it (these would last about 15 seconds) and then there would be others that would have 30+ bursts (these would last about 8 minutes) and reach 40-50 feet. I am not sure when it went completely dormant, but it was dead by 1994. MK -------------- next part -------------- An HTML attachment was scrubbed... URL: </geyser-list/attachments/20070124/9a86cc59/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: Bear Den Keller 10-86.jpg Type: image/jpeg Size: 313394 bytes Desc: not available URL: </geyser-list/attachments/20070124/9a86cc59/attachment.jpg>