File:Undular bore Araguari River-Brazil-USGS-bws00026.jpg
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Summary
| Description |
English: Description at USGS website: "Undular bore and whelps near the mouth of Araguari River, Brazil. View is oblique toward mouth from airplane at approximately 100 ft. altitude. Portion published as Figure 5 in U. S. Geological Survey, Circular 1022, 1988." Note: This undular bore (locally known as pororoca) is on the Araguari River in the Amapá state in north-eastern Brazil, see w:Tidal bore#South America. The bore propagates from left to right, against the stream of the river current. |
| Date | |
| Source | U.S. Geological Survey Photographic Library |
| Author | USGS: Susan Bartsch-Winkler and David K. Lynch |
Licensing
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This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:30, 16 March 2012 | No thumbnail | 5,964 × 3,970 (12.16 MB) | Crowsnest |
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