File:Bottomless Pit Rio de Flag Flagstaff.png
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| Description |
English: Water flowing in the 'bottomless pit', a limestone sinkhole drain, near Flagstaff in c. 1915 |
| Date | |
| Source | https://blog.azgs.arizona.edu/blog/2019-06/new-publication-explores-origin-and-geology-rio-de-flag-flagstaff-arizona |
| Author | A. E. Hackett |
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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| current | 03:29, 7 April 2020 | | 773 × 609 (727 KB) | Kingsif (talk | contribs) | Uploaded a work by A. E. Hackett from https://blog.azgs.arizona.edu/blog/2019-06/new-publication-explores-origin-and-geology-rio-de-flag-flagstaff-arizona with UploadWizard |
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