| Date: | 1967-08-01 |
| Time: | 1820 |
| Geyser: | Dark Cavern |
| Webcam: | No |
| Initial: | No |
| Major/Minor: | N/A |
| Duration: | 8m |
| Standardized Duration: | 8m |
| Time Entered: | 2023-12-21 21:41:52 |
| Time Uploaded: | 2023-12-21 21:41:52 |
| Entrant: | research-mab |
| Observer: | E. Leigh - Norris Thermal Record 1967-69 |
| Submitted to: | Geysertimes.org |
| Comments: | watched it from 620 pm to 6:28 pm. I have never seen it play this long |