Rationalizing. . .
| Geyser: | Dark Cavern |
| Date/Time: | 1964-06-21 @ 1500 |
| Entrant: | research-mab |
| Observer: | 1964 log |
| Time Entered: | 2017-09-17 15:33:27 |
| Time Uploaded: | 2017-10-02 14:45:06 |
| Submitted to: | |
| Note: | 06/21/1964 Dark Cavern 3:00p Bill Lewis observed this for ~ 30 min and found that it had a very nearly regular 10 min cycle. To Mr. Lewis’ knowledge this is the only geyser in the park which starts with a steam phase (rather than H20). |