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| Country: | Portugal (Portuguese Republic) | |
| Continent: | Europe (Southern Europe) | |
| Region: | Porto | |
| Subregion: | Porto | |
| Code: | PT-PO-PO | |
| Place of discovery: | Porto Rio Douro | |
Sand type: | River | |
Coordinates: | 41.1403, -8.5837 * | |
| Height (sea level): | 2m (± 10m) | |
| Collection date: | --- |
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* The exact information is the "place of discovery description". The coordinates are only for information and only show the possible place of discovery of the sand.