eet; this duration increases with elevation at the rate of 29 days for every 1,000 feet." (from http://www.yellowstone.net/125th.htm)
             The weather and climatic conditions of Yellowstone are very changeable and unstable: "The bottom line for visitors to Yellowstone is that they should expect any kind of weather at any time of year Snow and cold weather can occur in any month of the year here. In fact, one snowstorm on August 25th in the early part of the century stranded a number of visitors at Old Faithful." (from http://www.yellowstone.net/125th.htm)
             The tectonics and future physical geography of Yellowstone were defined by volcanic activity in prehistoric times. Massive
             ...