African Geographic Pictures Collection
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| Image number: | 2290 |
| Feature : | desert varnish |
| Grouping : | weathering |
| Discipline : | geomorphology |
| Year : | 1999 |
| Locality : | Nakheil |
| Country : | Egypt |
| Region - tribe : | Quseir |
| Physiographic region : | Red Sea Mountains |
| Notice : | The gully wall in this alluvial fan shows that the gravels on the fan and the finer earth are brownish in color. On the alluvial fan, the free surface of the gravels shows a dark coating of Iron and manganese oxides. Because it takes many thousands of years for such a 'desert varnish' to develop, we can assume that the dark parts of alluvial fans are old landforms. |
| Reference : | Moeyersons, Jan, 1999 Image 2290. In : Moeyersons, Jan : "African Geographic Pictures", http://www.africamuseum.be/de/research/collections_libraries/earth_sciences/collections/geopic" |