African Geographic Pictures Collection
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| Image number: | 61 |
| Feature : | prismatic structure |
| Grouping : | volcanics |
| Discipline : | geology |
| Year : | 2002 |
| Locality : | Delgo |
| Country : | Sudan |
| Region - tribe : | Nile valley |
| Physiographic region : | Desert-Sahara |
| Notice : | By cooling of basalt flow: 'organ pipes' |
| Reference : | Moeyersons, Jan, 2002 Image 61. In : Moeyersons, Jan : "African Geographic Pictures", http://www.africamuseum.be/de/research/collections_libraries/earth_sciences/collections/geopic" |